TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Šućurović, Katarina
AU  - Đuriš, Mihal
AU  - Arsenijević, Zorana
AU  - Krstić, Sanja
AU  - Bošković-Vragolović, Nevenka
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7410
AB  - In this work, the coefficient of fluid-wall mass transfer in an inverse fluidized bed was determined using the adsorption method. The experiments were carried out in a column with a diameter of 45 mm with spherical and non-spherical particles of polypropylene and polyethylene with a diameter of 3.3-4.9 mm and a density of about 930 kg m-3. A diluted solution of methylene blue was used as a fluidization medium, which was adsorbed on part of the surface of the column on silica gel. The obtained results showed that the presence of particles during inverse fluidization does not contribute significantly to mass transfer compared to the influence of particles on transfer in conventional fluidized beds. Therefore, the pseudofluid concept was introduced into the analysis and an empirical correlation was performed to determine the mass transfer coefficient. The obtained results were compared with literature correlations for inverse and conventional fluidized beds.
AB  - У овом раду је одређиван коефицијент преноса масе флуид-зид у инверзнофлуидизованом слоју применом адсорпционе методе. Експерименти су вршени у колони  пречника 45 мм са сферичним и несферичним честицама полипропилена и полиетилена  пречника 3.3-4.9 мм и густине око 930 кг м-3. Као флуидизациони медијум коришћен је  разблажени раствор метиленски плавог који је адсорбован на делу површине колоне на  силикагелу. Добијени резултати показали су да присуство честица при инверзној  флуидизацији не доприноси значајно преносу масе у поређењу са утицајем честица на  пренос масе у конвенционално флуидизованим слојевима. Због тога је у анализу уведен  концепт псеудофлуида и изведена је емпиријска корелација за одређивање коефицијента  преноса масе. Извршено је поређење добијених резултата са литературним корелацијама за  инверзну и конвенционалну флуидизације.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Mass transfer in inverse fluidized beds
T1  - Пренос масе у инверзно флуидизованом слоју
VL  - 88
IS  - 9
SP  - 905
EP  - 919
DO  - 10.2298/JSC230116016J
ER  - 

@article{
author = "Jaćimovski, Darko and Šućurović, Katarina and Đuriš, Mihal and Arsenijević, Zorana and Krstić, Sanja and Bošković-Vragolović, Nevenka",
year = "2023",
abstract = "In this work, the coefficient of fluid-wall mass transfer in an inverse fluidized bed was determined using the adsorption method. The experiments were carried out in a column with a diameter of 45 mm with spherical and non-spherical particles of polypropylene and polyethylene with a diameter of 3.3-4.9 mm and a density of about 930 kg m-3. A diluted solution of methylene blue was used as a fluidization medium, which was adsorbed on part of the surface of the column on silica gel. The obtained results showed that the presence of particles during inverse fluidization does not contribute significantly to mass transfer compared to the influence of particles on transfer in conventional fluidized beds. Therefore, the pseudofluid concept was introduced into the analysis and an empirical correlation was performed to determine the mass transfer coefficient. The obtained results were compared with literature correlations for inverse and conventional fluidized beds., У овом раду је одређиван коефицијент преноса масе флуид-зид у инверзнофлуидизованом слоју применом адсорпционе методе. Експерименти су вршени у колони  пречника 45 мм са сферичним и несферичним честицама полипропилена и полиетилена  пречника 3.3-4.9 мм и густине око 930 кг м-3. Као флуидизациони медијум коришћен је  разблажени раствор метиленски плавог који је адсорбован на делу површине колоне на  силикагелу. Добијени резултати показали су да присуство честица при инверзној  флуидизацији не доприноси значајно преносу масе у поређењу са утицајем честица на  пренос масе у конвенционално флуидизованим слојевима. Због тога је у анализу уведен  концепт псеудофлуида и изведена је емпиријска корелација за одређивање коефицијента  преноса масе. Извршено је поређење добијених резултата са литературним корелацијама за  инверзну и конвенционалну флуидизације.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Mass transfer in inverse fluidized beds, Пренос масе у инверзно флуидизованом слоју",
volume = "88",
number = "9",
pages = "905-919",
doi = "10.2298/JSC230116016J"
}

Jaćimovski, D., Šućurović, K., Đuriš, M., Arsenijević, Z., Krstić, S.,& Bošković-Vragolović, N.. (2023). Mass transfer in inverse fluidized beds. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 88(9), 905-919.
https://doi.org/10.2298/JSC230116016J

Jaćimovski D, Šućurović K, Đuriš M, Arsenijević Z, Krstić S, Bošković-Vragolović N. Mass transfer in inverse fluidized beds. in Journal of the Serbian Chemical Society. 2023;88(9):905-919.
doi:10.2298/JSC230116016J .

Jaćimovski, Darko, Šućurović, Katarina, Đuriš, Mihal, Arsenijević, Zorana, Krstić, Sanja, Bošković-Vragolović, Nevenka, "Mass transfer in inverse fluidized beds" in Journal of the Serbian Chemical Society, 88, no. 9 (2023):905-919,
https://doi.org/10.2298/JSC230116016J . .

TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Šućurović, Katarina
AU  - Đuriš, Mihal
AU  - Arsenijević, Zorana
AU  - Krstić, Sanja
AU  - Bošković-Vragolović, Nevenka
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6303
AB  - In this work, the coefficient of fluid-wall mass transfer in an inverse fluidized bed was determined using the adsorption method. The experiments were carried out in a column with a diameter of 45 mm with spherical and non-spherical particles of polypropylene and polyethylene with a diameter of 3.3-4.9 mm and a density of about 930 kg m-3. A diluted solution of methylene blue was used as a fluidization medium, which was adsorbed on part of the surface of the column on silica gel. The obtained results showed that the presence of particles during inverse fluidization does not contribute significantly to mass transfer compared to the influence of particles on transfer in conventional fluidized beds. Therefore, the pseudofluid concept was introduced into the analysis and an empirical correlation was performed to determine the mass transfer coefficient. The obtained results were compared with literature correlations for inverse and conventional fluidized beds.
AB  - У овом раду је одређиван коефицијент преноса масе флуид-зид у инверзнофлуидизованом слоју применом адсорпционе методе. Експерименти су вршени у колони  пречника 45 мм са сферичним и несферичним честицама полипропилена и полиетилена  пречника 3.3-4.9 мм и густине око 930 кг м-3. Као флуидизациони медијум коришћен је  разблажени раствор метиленски плавог који је адсорбован на делу површине колоне на  силикагелу. Добијени резултати показали су да присуство честица при инверзној  флуидизацији не доприноси значајно преносу масе у поређењу са утицајем честица на  пренос масе у конвенционално флуидизованим слојевима. Због тога је у анализу уведен  концепт псеудофлуида и изведена је емпиријска корелација за одређивање коефицијента  преноса масе. Извршено је поређење добијених резултата са литературним корелацијама за  инверзну и конвенционалну флуидизације.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Mass transfer in inverse fluidized beds
T1  - Пренос масе у инверзно флуидизованом слоју
VL  - 88
IS  - 9
SP  - 905
EP  - 919
DO  - 10.2298/JSC230116016J
ER  - 

@article{
author = "Jaćimovski, Darko and Šućurović, Katarina and Đuriš, Mihal and Arsenijević, Zorana and Krstić, Sanja and Bošković-Vragolović, Nevenka",
year = "2023",
abstract = "In this work, the coefficient of fluid-wall mass transfer in an inverse fluidized bed was determined using the adsorption method. The experiments were carried out in a column with a diameter of 45 mm with spherical and non-spherical particles of polypropylene and polyethylene with a diameter of 3.3-4.9 mm and a density of about 930 kg m-3. A diluted solution of methylene blue was used as a fluidization medium, which was adsorbed on part of the surface of the column on silica gel. The obtained results showed that the presence of particles during inverse fluidization does not contribute significantly to mass transfer compared to the influence of particles on transfer in conventional fluidized beds. Therefore, the pseudofluid concept was introduced into the analysis and an empirical correlation was performed to determine the mass transfer coefficient. The obtained results were compared with literature correlations for inverse and conventional fluidized beds., У овом раду је одређиван коефицијент преноса масе флуид-зид у инверзнофлуидизованом слоју применом адсорпционе методе. Експерименти су вршени у колони  пречника 45 мм са сферичним и несферичним честицама полипропилена и полиетилена  пречника 3.3-4.9 мм и густине око 930 кг м-3. Као флуидизациони медијум коришћен је  разблажени раствор метиленски плавог који је адсорбован на делу површине колоне на  силикагелу. Добијени резултати показали су да присуство честица при инверзној  флуидизацији не доприноси значајно преносу масе у поређењу са утицајем честица на  пренос масе у конвенционално флуидизованим слојевима. Због тога је у анализу уведен  концепт псеудофлуида и изведена је емпиријска корелација за одређивање коефицијента  преноса масе. Извршено је поређење добијених резултата са литературним корелацијама за  инверзну и конвенционалну флуидизације.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Mass transfer in inverse fluidized beds, Пренос масе у инверзно флуидизованом слоју",
volume = "88",
number = "9",
pages = "905-919",
doi = "10.2298/JSC230116016J"
}

Jaćimovski, D., Šućurović, K., Đuriš, M., Arsenijević, Z., Krstić, S.,& Bošković-Vragolović, N.. (2023). Mass transfer in inverse fluidized beds. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 88(9), 905-919.
https://doi.org/10.2298/JSC230116016J

Jaćimovski D, Šućurović K, Đuriš M, Arsenijević Z, Krstić S, Bošković-Vragolović N. Mass transfer in inverse fluidized beds. in Journal of the Serbian Chemical Society. 2023;88(9):905-919.
doi:10.2298/JSC230116016J .

Jaćimovski, Darko, Šućurović, Katarina, Đuriš, Mihal, Arsenijević, Zorana, Krstić, Sanja, Bošković-Vragolović, Nevenka, "Mass transfer in inverse fluidized beds" in Journal of the Serbian Chemical Society, 88, no. 9 (2023):905-919,
https://doi.org/10.2298/JSC230116016J . .

TY  - JOUR
AU  - Šućurović, Katarina
AU  - Jaćimovski, Darko
AU  - Đuriš, Mihal
AU  - Arsenijević, Zorana
AU  - Bošković-Vragolović, Nevenka
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5956
AB  - To define the fluid-dynamic properties of inverse fluidized beds, studies of the minimum fluidization velocity and bed expansion were performed in this work. The experiments were performed in
an inverse fluidized bed of polypropylene and polystyrene particles in a cylindrical column using
water and an aqueous glycerol solution of different concentrations as fluidizing medium. The
dependence of the bed porosity on the superficial velocity of the fluid was determined experimentally for all the particles studied and different fluidizing media. The influence of fluidizing
medium viscosity and particle density on the expansion of the inverse fluidized bed and on the
minimum fluidization velocity was investigated. Comparison of the experimental data for the
expansion of the inverse fluidized bed and the values calculated by the Richardson-Zaki
correlation for the conventional fluidized bed showed some deviation, but the experimentally
determined data were found to follow the shape of the Richardson-Zaki curve. In this paper, a
correlation for the expansion of inverse fluidized beds is proposed
PB  - Taylor & Francis
T2  - Particulate Science and Technology
T1  - Minimum fluidization velocity and bed expansion of the inverse fluidized bed
DO  - 10.1080/02726351.2023.2182732
ER  - 

@article{
author = "Šućurović, Katarina and Jaćimovski, Darko and Đuriš, Mihal and Arsenijević, Zorana and Bošković-Vragolović, Nevenka",
year = "2023",
abstract = "To define the fluid-dynamic properties of inverse fluidized beds, studies of the minimum fluidization velocity and bed expansion were performed in this work. The experiments were performed in
an inverse fluidized bed of polypropylene and polystyrene particles in a cylindrical column using
water and an aqueous glycerol solution of different concentrations as fluidizing medium. The
dependence of the bed porosity on the superficial velocity of the fluid was determined experimentally for all the particles studied and different fluidizing media. The influence of fluidizing
medium viscosity and particle density on the expansion of the inverse fluidized bed and on the
minimum fluidization velocity was investigated. Comparison of the experimental data for the
expansion of the inverse fluidized bed and the values calculated by the Richardson-Zaki
correlation for the conventional fluidized bed showed some deviation, but the experimentally
determined data were found to follow the shape of the Richardson-Zaki curve. In this paper, a
correlation for the expansion of inverse fluidized beds is proposed",
publisher = "Taylor & Francis",
journal = "Particulate Science and Technology",
title = "Minimum fluidization velocity and bed expansion of the inverse fluidized bed",
doi = "10.1080/02726351.2023.2182732"
}

Šućurović, K., Jaćimovski, D., Đuriš, M., Arsenijević, Z.,& Bošković-Vragolović, N.. (2023). Minimum fluidization velocity and bed expansion of the inverse fluidized bed. in Particulate Science and Technology
Taylor & Francis..
https://doi.org/10.1080/02726351.2023.2182732

Šućurović K, Jaćimovski D, Đuriš M, Arsenijević Z, Bošković-Vragolović N. Minimum fluidization velocity and bed expansion of the inverse fluidized bed. in Particulate Science and Technology. 2023;.
doi:10.1080/02726351.2023.2182732 .

Šućurović, Katarina, Jaćimovski, Darko, Đuriš, Mihal, Arsenijević, Zorana, Bošković-Vragolović, Nevenka, "Minimum fluidization velocity and bed expansion of the inverse fluidized bed" in Particulate Science and Technology (2023),
https://doi.org/10.1080/02726351.2023.2182732 . .

TY  - JOUR
AU  - Brzić, Danica
AU  - Pešić, Radojica
AU  - Arsenijević, Zorana
AU  - Đuriš, Mihal
AU  - Bošković-Vragolović, Nevenka
AU  - Kaluđerović-Radoičić, Tatjana
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5247
AB  - The present work concerns an experimental study on heat transfer in gas-solid fluidized bed of coarse (Geldart D) particles to a larger immersed sphere at high superficial velocities from 2 to 5.5 Umf. The heat transfer coefficient was determined by measuring the temperature of the test sphere during its heating in a fluidized bed in the temperature range of 65–175 °C. The test spheres of different sizes and different materials were utilized. For the given gas-particles system the flow regime changes from rapidly growing bubbles to turbulent fluidization at superficial velocity Uc ≈ 3Umf. It has been found that in rapidly growing bubbles regime, the heat transfer coefficient is higher for smaller test spheres while it is almost independent of the superficial gas velocity. In turbulent regime, the heat transfer coefficient increases with increase of gas velocity while the size of the test sphere exhibits less influence. In the rapidly growing bubbles regime, experimental data for heat transfer coefficient can be predicted adequately with correlation of Scott et al.. For the turbulent flow regime a new correlation for prediction of the heat transfer coefficient has been proposed.
PB  - Taylor & Francis
T2  - Particulate Science and Technology
T1  - Heat transfer to a sphere immersed in a fluidized bed of coarse particles with transition from bubbling to turbulent flow regime
VL  - 41
IS  - 1
SP  - 75
EP  - 83
DO  - 10.1080/02726351.2022.2053015
ER  - 

@article{
author = "Brzić, Danica and Pešić, Radojica and Arsenijević, Zorana and Đuriš, Mihal and Bošković-Vragolović, Nevenka and Kaluđerović-Radoičić, Tatjana",
year = "2023",
abstract = "The present work concerns an experimental study on heat transfer in gas-solid fluidized bed of coarse (Geldart D) particles to a larger immersed sphere at high superficial velocities from 2 to 5.5 Umf. The heat transfer coefficient was determined by measuring the temperature of the test sphere during its heating in a fluidized bed in the temperature range of 65–175 °C. The test spheres of different sizes and different materials were utilized. For the given gas-particles system the flow regime changes from rapidly growing bubbles to turbulent fluidization at superficial velocity Uc ≈ 3Umf. It has been found that in rapidly growing bubbles regime, the heat transfer coefficient is higher for smaller test spheres while it is almost independent of the superficial gas velocity. In turbulent regime, the heat transfer coefficient increases with increase of gas velocity while the size of the test sphere exhibits less influence. In the rapidly growing bubbles regime, experimental data for heat transfer coefficient can be predicted adequately with correlation of Scott et al.. For the turbulent flow regime a new correlation for prediction of the heat transfer coefficient has been proposed.",
publisher = "Taylor & Francis",
journal = "Particulate Science and Technology",
title = "Heat transfer to a sphere immersed in a fluidized bed of coarse particles with transition from bubbling to turbulent flow regime",
volume = "41",
number = "1",
pages = "75-83",
doi = "10.1080/02726351.2022.2053015"
}

Brzić, D., Pešić, R., Arsenijević, Z., Đuriš, M., Bošković-Vragolović, N.,& Kaluđerović-Radoičić, T.. (2023). Heat transfer to a sphere immersed in a fluidized bed of coarse particles with transition from bubbling to turbulent flow regime. in Particulate Science and Technology
Taylor & Francis., 41(1), 75-83.
https://doi.org/10.1080/02726351.2022.2053015

Brzić D, Pešić R, Arsenijević Z, Đuriš M, Bošković-Vragolović N, Kaluđerović-Radoičić T. Heat transfer to a sphere immersed in a fluidized bed of coarse particles with transition from bubbling to turbulent flow regime. in Particulate Science and Technology. 2023;41(1):75-83.
doi:10.1080/02726351.2022.2053015 .

Brzić, Danica, Pešić, Radojica, Arsenijević, Zorana, Đuriš, Mihal, Bošković-Vragolović, Nevenka, Kaluđerović-Radoičić, Tatjana, "Heat transfer to a sphere immersed in a fluidized bed of coarse particles with transition from bubbling to turbulent flow regime" in Particulate Science and Technology, 41, no. 1 (2023):75-83,
https://doi.org/10.1080/02726351.2022.2053015 . .

TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Brzić, Danica
AU  - Garić Grulović, Radmila
AU  - Pjanović, Rada
AU  - Đuriš, Mihal
AU  - Arsenijević, Zorana
AU  - Bošković-Vragolović, Nevenka
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5248
AB  - In this work the theoretical model for heat transfer from a wall to aliquid-solid fluidized bed by liquid convective mechanism has been proposed.The model is based on thickness of boundary layer and film theory. The keyparameter in the model is the distance between two adjacent particles whichcollide with the wall. According to the proposed model, the liquid convectiveheat transfer in a fluidized bed is 4 to 5 times more intense than in a single-phaseflow. Additionally, the wall-to-bed heat transfer coefficient has been measuredexperimentally in water –glass particles fluidized bed, for different particle sizes.Comparison of the model prediction with experimental data has shown that sizeof the particles strongly influences the mechanism of heat transfer. For fineparticles of 0.8 mm in diameter, the liquid convective heat transfer modelrepresents adequately the experimental data, indicating that particle convectivemechanism is negligible. For coarse particles of 1.5 - 2 mm in diameter, theliquid convective heat transfer mechanism accounts for 60 % of the overall heattransfer coefficient
AB  - У овом раду развијен је теоријски модел преноса топлоте конвективним механизмомса зида колоне на течност у партикулативно флуидизованом слоју. Модел је заснован надебљини граничног слоја и теорији филма. Кључни параметар модела је растојање измеђудвe суседне честице које се сударају са зидом колоне. Према предложеном моделу преностоплоте конвекцијом на течност у флуидизованом слоју је 4 до 5 пута интензивнији него уједнофазном току. Коефицијенти преноса топлоте су експериментално одређени уфлуидизованом слоју вода-стаклене сфере, за различите пречнике честица. Поређењеексперименталних резултата и предвиђања модела је показало да пречник честица значајноутиче на механизам преноса топлоте. За веома ситне честице пречника 0.8 mm, моделпреноса топлоте конвекцијом на течност у потпуности репрезентује експерименталнерезултате, указујући да је пренос топлоте честицама занемарљив. За крупне честице,пречника 1.5 -2 mm, конвективни пренос на течност чини 60 % од укупног коефицијентапреноса топлоте
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Heat transfer by liquid convection in particulate fluidized beds
T1  - Пренос топлоте конвективним механизмом у партикулативно флуидизованом слоју
VL  - 87
IS  - 7-8
SP  - 911
EP  - 924
DO  - 10.2298/JSC211216020J
ER  - 

@article{
author = "Jaćimovski, Darko and Brzić, Danica and Garić Grulović, Radmila and Pjanović, Rada and Đuriš, Mihal and Arsenijević, Zorana and Bošković-Vragolović, Nevenka",
year = "2022",
abstract = "In this work the theoretical model for heat transfer from a wall to aliquid-solid fluidized bed by liquid convective mechanism has been proposed.The model is based on thickness of boundary layer and film theory. The keyparameter in the model is the distance between two adjacent particles whichcollide with the wall. According to the proposed model, the liquid convectiveheat transfer in a fluidized bed is 4 to 5 times more intense than in a single-phaseflow. Additionally, the wall-to-bed heat transfer coefficient has been measuredexperimentally in water –glass particles fluidized bed, for different particle sizes.Comparison of the model prediction with experimental data has shown that sizeof the particles strongly influences the mechanism of heat transfer. For fineparticles of 0.8 mm in diameter, the liquid convective heat transfer modelrepresents adequately the experimental data, indicating that particle convectivemechanism is negligible. For coarse particles of 1.5 - 2 mm in diameter, theliquid convective heat transfer mechanism accounts for 60 % of the overall heattransfer coefficient, У овом раду развијен је теоријски модел преноса топлоте конвективним механизмомса зида колоне на течност у партикулативно флуидизованом слоју. Модел је заснован надебљини граничног слоја и теорији филма. Кључни параметар модела је растојање измеђудвe суседне честице које се сударају са зидом колоне. Према предложеном моделу преностоплоте конвекцијом на течност у флуидизованом слоју је 4 до 5 пута интензивнији него уједнофазном току. Коефицијенти преноса топлоте су експериментално одређени уфлуидизованом слоју вода-стаклене сфере, за различите пречнике честица. Поређењеексперименталних резултата и предвиђања модела је показало да пречник честица значајноутиче на механизам преноса топлоте. За веома ситне честице пречника 0.8 mm, моделпреноса топлоте конвекцијом на течност у потпуности репрезентује експерименталнерезултате, указујући да је пренос топлоте честицама занемарљив. За крупне честице,пречника 1.5 -2 mm, конвективни пренос на течност чини 60 % од укупног коефицијентапреноса топлоте",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Heat transfer by liquid convection in particulate fluidized beds, Пренос топлоте конвективним механизмом у партикулативно флуидизованом слоју",
volume = "87",
number = "7-8",
pages = "911-924",
doi = "10.2298/JSC211216020J"
}

Jaćimovski, D., Brzić, D., Garić Grulović, R., Pjanović, R., Đuriš, M., Arsenijević, Z.,& Bošković-Vragolović, N.. (2022). Heat transfer by liquid convection in particulate fluidized beds. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 87(7-8), 911-924.
https://doi.org/10.2298/JSC211216020J

Jaćimovski D, Brzić D, Garić Grulović R, Pjanović R, Đuriš M, Arsenijević Z, Bošković-Vragolović N. Heat transfer by liquid convection in particulate fluidized beds. in Journal of the Serbian Chemical Society. 2022;87(7-8):911-924.
doi:10.2298/JSC211216020J .

Jaćimovski, Darko, Brzić, Danica, Garić Grulović, Radmila, Pjanović, Rada, Đuriš, Mihal, Arsenijević, Zorana, Bošković-Vragolović, Nevenka, "Heat transfer by liquid convection in particulate fluidized beds" in Journal of the Serbian Chemical Society, 87, no. 7-8 (2022):911-924,
https://doi.org/10.2298/JSC211216020J . .

TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Šućurović, Katarina
AU  - Đuriš, Mihal
AU  - Arsenijević, Zorana
AU  - Bošković-Vragolović, Nevenka
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5620
AB  - The movement of particles in the fluidized bed primarily determines the mixing in the bed and determines the transfer intensities that occur between the particles and the fluid. Experimental monitoring of the velocity of the marked particle was performed in an inversely fluidized bed of polypropylene, polyethylene, and polystyrene particles. The velocity of the marked particle was monitored in a two-dimensional column, where water and an aqueous solution of glycerin were used as the fluidization medium. Using the Tracker Video Analysis program (Tracker Video Analysis, Open Source Physics, 2003), the mean velocity of the marked particle was determined, as well as the distance crossed by the marked particle in the x and y directions. The influence of fluidization medium viscosity and particle density on the velocity of the marked particle was investigated. The results of experimental investigations have shown that the particle velocity distribution approximately follows the Maxwell distribution. Comparison of the measured values of the mean velocity in the inversely and conventionally fluidized bed showed a certain deviation. In this paper, a correlation for determining the mean particle velocity in an inversely fluidized bed is proposed.
PB  - Informa UK Limited
T2  - Particulate Science and Technology
T1  - Movement and velocity of a particle in an inverse fluidized bed
DO  - 10.1080/02726351.2022.2119625
ER  - 

@article{
author = "Jaćimovski, Darko and Šućurović, Katarina and Đuriš, Mihal and Arsenijević, Zorana and Bošković-Vragolović, Nevenka",
year = "2022",
abstract = "The movement of particles in the fluidized bed primarily determines the mixing in the bed and determines the transfer intensities that occur between the particles and the fluid. Experimental monitoring of the velocity of the marked particle was performed in an inversely fluidized bed of polypropylene, polyethylene, and polystyrene particles. The velocity of the marked particle was monitored in a two-dimensional column, where water and an aqueous solution of glycerin were used as the fluidization medium. Using the Tracker Video Analysis program (Tracker Video Analysis, Open Source Physics, 2003), the mean velocity of the marked particle was determined, as well as the distance crossed by the marked particle in the x and y directions. The influence of fluidization medium viscosity and particle density on the velocity of the marked particle was investigated. The results of experimental investigations have shown that the particle velocity distribution approximately follows the Maxwell distribution. Comparison of the measured values of the mean velocity in the inversely and conventionally fluidized bed showed a certain deviation. In this paper, a correlation for determining the mean particle velocity in an inversely fluidized bed is proposed.",
publisher = "Informa UK Limited",
journal = "Particulate Science and Technology",
title = "Movement and velocity of a particle in an inverse fluidized bed",
doi = "10.1080/02726351.2022.2119625"
}

Jaćimovski, D., Šućurović, K., Đuriš, M., Arsenijević, Z.,& Bošković-Vragolović, N.. (2022). Movement and velocity of a particle in an inverse fluidized bed. in Particulate Science and Technology
Informa UK Limited..
https://doi.org/10.1080/02726351.2022.2119625

Jaćimovski D, Šućurović K, Đuriš M, Arsenijević Z, Bošković-Vragolović N. Movement and velocity of a particle in an inverse fluidized bed. in Particulate Science and Technology. 2022;.
doi:10.1080/02726351.2022.2119625 .

Jaćimovski, Darko, Šućurović, Katarina, Đuriš, Mihal, Arsenijević, Zorana, Bošković-Vragolović, Nevenka, "Movement and velocity of a particle in an inverse fluidized bed" in Particulate Science and Technology (2022),
https://doi.org/10.1080/02726351.2022.2119625 . .

TY  - JOUR
AU  - Marković, Maja
AU  - Panić, Vesna
AU  - Šešlija, Sanja
AU  - Milivojević, Ana D.
AU  - Spasojević, Pavle
AU  - Bošković-Vragolović, Nevenka
AU  - Pjanović, Rada
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3604
AB  - Carriers for targeted delivery and controlled release of poorly water-soluble active
substances (PWSAS) are facing three challenges: (a) the encapsulation issues, (b)
limitations of PWSAS water solubility, and (c) burst drug release which can be
pharmacologically dangerous and economically inefficient. The present study
brings a novel strategy for encapsulation and controlled release of PWSAS—
caffeine in concentrations which are higher than its maximal water solubility
without the possibility of burst effect. The modification of hydrophilic carrier
based on poly(methacylic acid) was done using casein and liposomes. To further
increase the maximal caffeine loading inside the carrier nicotinamide was used.
The release study of the encapsulated PWSAS was elaborated with respect to morphology
of the carriers and interactions that could be established between its
structural components. The carriers swelling and the release of caffeine and nicotinamide
were also investigated depending on caffeine concentration, the presence
of different liposomal formulations and the volume ratio of liposomal formulation,
in three media with different pH simulating the path of the carrier through the
human gastrointestinal tract. The synthesized carriers are promising candidates
for encapsulation of PWSAS in concentrations which are higher than its maximal
water solubility and for the targeted delivery of those dosages.
PB  - Wiley
T2  - Polymer Engineering & Science
T1  - Novel strategy for encapsulation and targeted delivery of poorly water-soluble active substances
VL  - 60
SP  - 2008
EP  - 2022
DO  - 10.1002/pen.25448
ER  - 

@article{
author = "Marković, Maja and Panić, Vesna and Šešlija, Sanja and Milivojević, Ana D. and Spasojević, Pavle and Bošković-Vragolović, Nevenka and Pjanović, Rada",
year = "2020",
abstract = "Carriers for targeted delivery and controlled release of poorly water-soluble active
substances (PWSAS) are facing three challenges: (a) the encapsulation issues, (b)
limitations of PWSAS water solubility, and (c) burst drug release which can be
pharmacologically dangerous and economically inefficient. The present study
brings a novel strategy for encapsulation and controlled release of PWSAS—
caffeine in concentrations which are higher than its maximal water solubility
without the possibility of burst effect. The modification of hydrophilic carrier
based on poly(methacylic acid) was done using casein and liposomes. To further
increase the maximal caffeine loading inside the carrier nicotinamide was used.
The release study of the encapsulated PWSAS was elaborated with respect to morphology
of the carriers and interactions that could be established between its
structural components. The carriers swelling and the release of caffeine and nicotinamide
were also investigated depending on caffeine concentration, the presence
of different liposomal formulations and the volume ratio of liposomal formulation,
in three media with different pH simulating the path of the carrier through the
human gastrointestinal tract. The synthesized carriers are promising candidates
for encapsulation of PWSAS in concentrations which are higher than its maximal
water solubility and for the targeted delivery of those dosages.",
publisher = "Wiley",
journal = "Polymer Engineering & Science",
title = "Novel strategy for encapsulation and targeted delivery of poorly water-soluble active substances",
volume = "60",
pages = "2008-2022",
doi = "10.1002/pen.25448"
}

Marković, M., Panić, V., Šešlija, S., Milivojević, A. D., Spasojević, P., Bošković-Vragolović, N.,& Pjanović, R.. (2020). Novel strategy for encapsulation and targeted delivery of poorly water-soluble active substances. in Polymer Engineering & Science
Wiley., 60, 2008-2022.
https://doi.org/10.1002/pen.25448

Marković M, Panić V, Šešlija S, Milivojević AD, Spasojević P, Bošković-Vragolović N, Pjanović R. Novel strategy for encapsulation and targeted delivery of poorly water-soluble active substances. in Polymer Engineering & Science. 2020;60:2008-2022.
doi:10.1002/pen.25448 .

Marković, Maja, Panić, Vesna, Šešlija, Sanja, Milivojević, Ana D., Spasojević, Pavle, Bošković-Vragolović, Nevenka, Pjanović, Rada, "Novel strategy for encapsulation and targeted delivery of poorly water-soluble active substances" in Polymer Engineering & Science, 60 (2020):2008-2022,
https://doi.org/10.1002/pen.25448 . .

TY  - JOUR
AU  - Marković, Maja
AU  - Panić, Vesna
AU  - Šešlija, Sanja
AU  - Spasojević, Pavle
AU  - Ugrinović, Vukašin
AU  - Bošković-Vragolović, Nevenka
AU  - Pjanović, Rada
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3641
AB  - pH sensitive, nontoxic, and biocompatible poly(methacrylic) acid (PMAA) based soft networks have been extensively used in the design of systems for targeted drug delivery. Still, their highly hydrophilic nature limits their potential to be used as a carrier of poorly water-soluble substances. With the aim to overcome this limitation, the present study details a new approach for modification of PMAA based carriers using two amphiphilic components: casein and liposomes. The FTIR analysis revealed structural features of each component as well as the synergetic effect that originated from the formation of specific interactions. Namely, hydrophobic interactions between the poorly water-soluble model drug (caffeine) and casein enabled caffeine encapsulation and controlled release, while addition of liposomes ensured better control of the release rate. The morphological properties of the carriers, swelling behavior, and release kinetics of caffeine were investigated depending on the variable synthesis parameters (neutralization degree of methacrylic acid, concentration of caffeine, presence/absence of liposomes) in two different media simulating the pH environment of human intestines and stomach. The data obtained from in vitro caffeine release were correlated and analyzed in detail using several mathematical models, indicating significant potential of investigated carriers for targeted delivery and controlled release of poorly water-soluble substances.
PB  - John Wiley and Sons Inc
T2  - Polymer Engineering and Science
T1  - Modification of hydrophilic polymer network to design a carrier for a poorly water-soluble substance
VL  - 60
SP  - 2496
EP  - 2510
DO  - 10.1002/pen.25487
ER  - 

@article{
author = "Marković, Maja and Panić, Vesna and Šešlija, Sanja and Spasojević, Pavle and Ugrinović, Vukašin and Bošković-Vragolović, Nevenka and Pjanović, Rada",
year = "2020",
abstract = "pH sensitive, nontoxic, and biocompatible poly(methacrylic) acid (PMAA) based soft networks have been extensively used in the design of systems for targeted drug delivery. Still, their highly hydrophilic nature limits their potential to be used as a carrier of poorly water-soluble substances. With the aim to overcome this limitation, the present study details a new approach for modification of PMAA based carriers using two amphiphilic components: casein and liposomes. The FTIR analysis revealed structural features of each component as well as the synergetic effect that originated from the formation of specific interactions. Namely, hydrophobic interactions between the poorly water-soluble model drug (caffeine) and casein enabled caffeine encapsulation and controlled release, while addition of liposomes ensured better control of the release rate. The morphological properties of the carriers, swelling behavior, and release kinetics of caffeine were investigated depending on the variable synthesis parameters (neutralization degree of methacrylic acid, concentration of caffeine, presence/absence of liposomes) in two different media simulating the pH environment of human intestines and stomach. The data obtained from in vitro caffeine release were correlated and analyzed in detail using several mathematical models, indicating significant potential of investigated carriers for targeted delivery and controlled release of poorly water-soluble substances.",
publisher = "John Wiley and Sons Inc",
journal = "Polymer Engineering and Science",
title = "Modification of hydrophilic polymer network to design a carrier for a poorly water-soluble substance",
volume = "60",
pages = "2496-2510",
doi = "10.1002/pen.25487"
}

Marković, M., Panić, V., Šešlija, S., Spasojević, P., Ugrinović, V., Bošković-Vragolović, N.,& Pjanović, R.. (2020). Modification of hydrophilic polymer network to design a carrier for a poorly water-soluble substance. in Polymer Engineering and Science
John Wiley and Sons Inc., 60, 2496-2510.
https://doi.org/10.1002/pen.25487

Marković M, Panić V, Šešlija S, Spasojević P, Ugrinović V, Bošković-Vragolović N, Pjanović R. Modification of hydrophilic polymer network to design a carrier for a poorly water-soluble substance. in Polymer Engineering and Science. 2020;60:2496-2510.
doi:10.1002/pen.25487 .

Marković, Maja, Panić, Vesna, Šešlija, Sanja, Spasojević, Pavle, Ugrinović, Vukašin, Bošković-Vragolović, Nevenka, Pjanović, Rada, "Modification of hydrophilic polymer network to design a carrier for a poorly water-soluble substance" in Polymer Engineering and Science, 60 (2020):2496-2510,
https://doi.org/10.1002/pen.25487 . .

TY  - JOUR
AU  - Đeković-Šević, Milica
AU  - Bošković-Vragolović, Nevenka
AU  - Garić Grulović, Radmila
AU  - Pejanović, Srđan
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2326
AB  - This work deals with gas absorption accompanied by chemical reaction in a liquid phase. Ozone absorption in potassium indigotrisulfonate solution was investigated in a batch bubble column. Enhancement factor for absorption accompanied by instantaneous chemical reaction in the liquid phase was experimentally determined, as a ratio of the volumetric mass transfer coefficient for the absorption accompanied by reaction to that for pure physical absorption. The influence of (a) the initial concentration of the solute from liquid phase and (b) the ozone concentration in gas phase on the enhancement factor were experimentally examined. The absorption accompanied by instantaneous chemical reaction is a diffusion-controlled process, whose rate depends upon the diffusivities of the absorbing gas and the solute in liquid phase. The influence of these diffusivities was found to be more significant for lower values of the enhancement factor. The rate of ozone absorption was followed by the time change of the solution color, using new method based on the computer program SigmaScan Pro 5 (Systat Software, Inc., San Jose, CA, USA). This investigation is a contribution to the prediction of the ozone consumption in wastewater treatment, in cases when ozone instantaneously reacts with substances present in water.
PB  - Taylor & Francis
T2  - Chemical Engineering Communications
T1  - Experimental study on the ozone absorption accompanied by instantaneous chemical reaction
VL  - 205
IS  - 5
SP  - 571
EP  - 580
DO  - 10.1080/00986445.2017.1399125
ER  - 

@article{
author = "Đeković-Šević, Milica and Bošković-Vragolović, Nevenka and Garić Grulović, Radmila and Pejanović, Srđan",
year = "2018",
abstract = "This work deals with gas absorption accompanied by chemical reaction in a liquid phase. Ozone absorption in potassium indigotrisulfonate solution was investigated in a batch bubble column. Enhancement factor for absorption accompanied by instantaneous chemical reaction in the liquid phase was experimentally determined, as a ratio of the volumetric mass transfer coefficient for the absorption accompanied by reaction to that for pure physical absorption. The influence of (a) the initial concentration of the solute from liquid phase and (b) the ozone concentration in gas phase on the enhancement factor were experimentally examined. The absorption accompanied by instantaneous chemical reaction is a diffusion-controlled process, whose rate depends upon the diffusivities of the absorbing gas and the solute in liquid phase. The influence of these diffusivities was found to be more significant for lower values of the enhancement factor. The rate of ozone absorption was followed by the time change of the solution color, using new method based on the computer program SigmaScan Pro 5 (Systat Software, Inc., San Jose, CA, USA). This investigation is a contribution to the prediction of the ozone consumption in wastewater treatment, in cases when ozone instantaneously reacts with substances present in water.",
publisher = "Taylor & Francis",
journal = "Chemical Engineering Communications",
title = "Experimental study on the ozone absorption accompanied by instantaneous chemical reaction",
volume = "205",
number = "5",
pages = "571-580",
doi = "10.1080/00986445.2017.1399125"
}

Đeković-Šević, M., Bošković-Vragolović, N., Garić Grulović, R.,& Pejanović, S.. (2018). Experimental study on the ozone absorption accompanied by instantaneous chemical reaction. in Chemical Engineering Communications
Taylor & Francis., 205(5), 571-580.
https://doi.org/10.1080/00986445.2017.1399125

Đeković-Šević M, Bošković-Vragolović N, Garić Grulović R, Pejanović S. Experimental study on the ozone absorption accompanied by instantaneous chemical reaction. in Chemical Engineering Communications. 2018;205(5):571-580.
doi:10.1080/00986445.2017.1399125 .

Đeković-Šević, Milica, Bošković-Vragolović, Nevenka, Garić Grulović, Radmila, Pejanović, Srđan, "Experimental study on the ozone absorption accompanied by instantaneous chemical reaction" in Chemical Engineering Communications, 205, no. 5 (2018):571-580,
https://doi.org/10.1080/00986445.2017.1399125 . .

TY  - JOUR
AU  - Kaluđerović-Radoičić, Tatjana
AU  - Bošković-Vragolović, Nevenka
AU  - Garić Grulović, Radmila
AU  - Đuriš, Mihal
AU  - Grbavčić, Željko
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2245
AB  - The aim of this work was the experimental evaluation of different friction factor correlations for water flow through packed beds of spherical and non-spherical particles at ambient temperature. The experiments were performed by measuring the pressure drop across the bed. Packed beds made of monosized glass spherical particles of seven different diameters were used, as well as beds made of 16 fractions of quartz filtration sand obtained by sieving (polydisperse non-spherical particles). The range of bed voidages was 0.359-0.486, while the range of bed particle Reynolds numbers was from 0.3 to 286 for spherical particles and from 0.1 to 50 for non-spherical particles. The obtained results were compared using a number of available literature correlations. In order to improve the correlation results for spherical particles, a new simple equation was proposed in the form of Ergun's equation, with modified coefficients. The new correlation had a mean absolute deviation between experimental and calculated values of pressure drop of 9.04%. For non-spherical quartz filtration sand particles the best fit was obtained using Ergun's equation, with a mean absolute deviation of 10.36%. Surface-volume diameter (dsv) necessary for correlating the data for filtration sand particles was calculated based on correlations for d(v) = f(d(m)) and psi = f(d(m)).
PB  - Association of the Chemical Engineers of Serbia
T2  - Chemical Industry and Chemical Engineering Quarterly / CICEQ
T1  - Friction factor for water flow through packed beds of spherical and non-spherical particles
VL  - 23
IS  - 1
SP  - 57
EP  - 66
DO  - 10.2298/CICEQ150506006K
ER  - 

@article{
author = "Kaluđerović-Radoičić, Tatjana and Bošković-Vragolović, Nevenka and Garić Grulović, Radmila and Đuriš, Mihal and Grbavčić, Željko",
year = "2017",
abstract = "The aim of this work was the experimental evaluation of different friction factor correlations for water flow through packed beds of spherical and non-spherical particles at ambient temperature. The experiments were performed by measuring the pressure drop across the bed. Packed beds made of monosized glass spherical particles of seven different diameters were used, as well as beds made of 16 fractions of quartz filtration sand obtained by sieving (polydisperse non-spherical particles). The range of bed voidages was 0.359-0.486, while the range of bed particle Reynolds numbers was from 0.3 to 286 for spherical particles and from 0.1 to 50 for non-spherical particles. The obtained results were compared using a number of available literature correlations. In order to improve the correlation results for spherical particles, a new simple equation was proposed in the form of Ergun's equation, with modified coefficients. The new correlation had a mean absolute deviation between experimental and calculated values of pressure drop of 9.04%. For non-spherical quartz filtration sand particles the best fit was obtained using Ergun's equation, with a mean absolute deviation of 10.36%. Surface-volume diameter (dsv) necessary for correlating the data for filtration sand particles was calculated based on correlations for d(v) = f(d(m)) and psi = f(d(m)).",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Chemical Industry and Chemical Engineering Quarterly / CICEQ",
title = "Friction factor for water flow through packed beds of spherical and non-spherical particles",
volume = "23",
number = "1",
pages = "57-66",
doi = "10.2298/CICEQ150506006K"
}

Kaluđerović-Radoičić, T., Bošković-Vragolović, N., Garić Grulović, R., Đuriš, M.,& Grbavčić, Ž.. (2017). Friction factor for water flow through packed beds of spherical and non-spherical particles. in Chemical Industry and Chemical Engineering Quarterly / CICEQ
Association of the Chemical Engineers of Serbia., 23(1), 57-66.
https://doi.org/10.2298/CICEQ150506006K

Kaluđerović-Radoičić T, Bošković-Vragolović N, Garić Grulović R, Đuriš M, Grbavčić Ž. Friction factor for water flow through packed beds of spherical and non-spherical particles. in Chemical Industry and Chemical Engineering Quarterly / CICEQ. 2017;23(1):57-66.
doi:10.2298/CICEQ150506006K .

Kaluđerović-Radoičić, Tatjana, Bošković-Vragolović, Nevenka, Garić Grulović, Radmila, Đuriš, Mihal, Grbavčić, Željko, "Friction factor for water flow through packed beds of spherical and non-spherical particles" in Chemical Industry and Chemical Engineering Quarterly / CICEQ, 23, no. 1 (2017):57-66,
https://doi.org/10.2298/CICEQ150506006K . .

TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Garić Grulović, Radmila
AU  - Vucetic, Nemanja
AU  - Pjanović, Rada
AU  - Bošković-Vragolović, Nevenka
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1931
AB  - The aim of this study was to analyze the concentration boundary layer for a comprehensive description of the mass transfer in systems with fluidized particles. Mass transfer from the wall of the column to the fluid in the presence of inert fluidized particles was experimentally investigated using the dissolution method. Experiments were carried out in a column 34 mm in diameter, divided by height into six segments. In all runs, mass transfer rates were determined in the presence of fluidized spherical glass particles 1.10 mm, 1.94 mm and 2.98 mm in diameter, using water as the fluidized medium. The analysis of the boundary layer shows the effect of particles presence on mass transfer in fluidized systems. The theoretical model was established based on boundary layer theory, and the impact of particles on the shortening of the boundary layer length, due to their collision with the wall of the column. The theoretically derived model was compared with experimentally obtained data and with data calculated from available literature correlations. Very good agreement was found between the model, experimental data, and published correlations (especially the correlation by Pickett et al. 12]).
PB  - Elsevier
T2  - Powder Technology
T1  - Mass transfer and concentration boundary layer in a particulate fluidized bed
VL  - 303
SP  - 68
EP  - 75
DO  - 10.1016/j.powtec.2016.09.025
ER  - 

@article{
author = "Jaćimovski, Darko and Garić Grulović, Radmila and Vucetic, Nemanja and Pjanović, Rada and Bošković-Vragolović, Nevenka",
year = "2016",
abstract = "The aim of this study was to analyze the concentration boundary layer for a comprehensive description of the mass transfer in systems with fluidized particles. Mass transfer from the wall of the column to the fluid in the presence of inert fluidized particles was experimentally investigated using the dissolution method. Experiments were carried out in a column 34 mm in diameter, divided by height into six segments. In all runs, mass transfer rates were determined in the presence of fluidized spherical glass particles 1.10 mm, 1.94 mm and 2.98 mm in diameter, using water as the fluidized medium. The analysis of the boundary layer shows the effect of particles presence on mass transfer in fluidized systems. The theoretical model was established based on boundary layer theory, and the impact of particles on the shortening of the boundary layer length, due to their collision with the wall of the column. The theoretically derived model was compared with experimentally obtained data and with data calculated from available literature correlations. Very good agreement was found between the model, experimental data, and published correlations (especially the correlation by Pickett et al. 12]).",
publisher = "Elsevier",
journal = "Powder Technology",
title = "Mass transfer and concentration boundary layer in a particulate fluidized bed",
volume = "303",
pages = "68-75",
doi = "10.1016/j.powtec.2016.09.025"
}

Jaćimovski, D., Garić Grulović, R., Vucetic, N., Pjanović, R.,& Bošković-Vragolović, N.. (2016). Mass transfer and concentration boundary layer in a particulate fluidized bed. in Powder Technology
Elsevier., 303, 68-75.
https://doi.org/10.1016/j.powtec.2016.09.025

Jaćimovski D, Garić Grulović R, Vucetic N, Pjanović R, Bošković-Vragolović N. Mass transfer and concentration boundary layer in a particulate fluidized bed. in Powder Technology. 2016;303:68-75.
doi:10.1016/j.powtec.2016.09.025 .

Jaćimovski, Darko, Garić Grulović, Radmila, Vucetic, Nemanja, Pjanović, Rada, Bošković-Vragolović, Nevenka, "Mass transfer and concentration boundary layer in a particulate fluidized bed" in Powder Technology, 303 (2016):68-75,
https://doi.org/10.1016/j.powtec.2016.09.025 . .

TY  - JOUR
AU  - Đeković-Šević, Milica
AU  - Bošković-Vragolović, Nevenka
AU  - Takić, Ljiljana
AU  - Garić Grulović, Radmila
AU  - Pejanović, Srđan
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1643
AB  - Experimental investigation of gas-liquid mass transfer of ozone in water, in bubble column with two-fluid nozzle gas distributor (BKDM), under different operating conditions, is presented in this work. The main objective was to determine the ozone volumetric mass transfer coefficient, kL a, in calm uniform section of the column, under different values of gas and liquid flow rates. Obtained values of these coefficients were compared with the values in countercurrent bubble column. The critical liquid flowrate, when gas hold up reaches its maximum, was experimentally determined. It was shown that the maximum value of the ozone volumetric mass transfer coefficient is obtained just when liquid flowrate is at its critical value.
AB  - U ovom radu prikazani su rezultati eksperimentalnih ispitivanja prenosa mase gas-tečnost pri ozonizaciji vode u barbotažnoj koloni sa dvofluidnom mlaznicom (BKDM) pod različitim operativnim uslovima. Cilj ovih ispitivanja bio je određivanje vrednosti zapreminskog koeficijenta prenosa mase ozona u vodi, kLa, u mirnoj zoni kolone, pri različitim protocima gasne i tečne faze. U radu je dato i poređenje kLa u BKDM sa vrednostima kLa u klasičnoj protivstrujnoj barbotažnoj koloni sa poroznom pločom tj. fritom. Eksperimentalno je određena vrednost kritičnog protoka tečnosti, pri kojem sadržaj gasa u disperziji, u mirnoj zoni kolone, dostiže svoju maksimalnu vrednost. Rezultati su pokazali da se pri kritičnom protoku tečnosti dobija maksimalna vrednost zapreminskog koeficijenta prenosa mase ozona u vodi.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Determination of the ozone volumetric mass transfer coefficient in bubble column with two-fluid nozzle gas distributor
T1  - Određivanje zapreminskog koeficijenta prenosa mase ozona u barbotažnoj koloni sa dvofluidnom mlaznicom
VL  - 69
IS  - 5
SP  - 553
EP  - 559
DO  - 10.2298/HEMIND140716075D
ER  - 

@article{
author = "Đeković-Šević, Milica and Bošković-Vragolović, Nevenka and Takić, Ljiljana and Garić Grulović, Radmila and Pejanović, Srđan",
year = "2015",
abstract = "Experimental investigation of gas-liquid mass transfer of ozone in water, in bubble column with two-fluid nozzle gas distributor (BKDM), under different operating conditions, is presented in this work. The main objective was to determine the ozone volumetric mass transfer coefficient, kL a, in calm uniform section of the column, under different values of gas and liquid flow rates. Obtained values of these coefficients were compared with the values in countercurrent bubble column. The critical liquid flowrate, when gas hold up reaches its maximum, was experimentally determined. It was shown that the maximum value of the ozone volumetric mass transfer coefficient is obtained just when liquid flowrate is at its critical value., U ovom radu prikazani su rezultati eksperimentalnih ispitivanja prenosa mase gas-tečnost pri ozonizaciji vode u barbotažnoj koloni sa dvofluidnom mlaznicom (BKDM) pod različitim operativnim uslovima. Cilj ovih ispitivanja bio je određivanje vrednosti zapreminskog koeficijenta prenosa mase ozona u vodi, kLa, u mirnoj zoni kolone, pri različitim protocima gasne i tečne faze. U radu je dato i poređenje kLa u BKDM sa vrednostima kLa u klasičnoj protivstrujnoj barbotažnoj koloni sa poroznom pločom tj. fritom. Eksperimentalno je određena vrednost kritičnog protoka tečnosti, pri kojem sadržaj gasa u disperziji, u mirnoj zoni kolone, dostiže svoju maksimalnu vrednost. Rezultati su pokazali da se pri kritičnom protoku tečnosti dobija maksimalna vrednost zapreminskog koeficijenta prenosa mase ozona u vodi.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Determination of the ozone volumetric mass transfer coefficient in bubble column with two-fluid nozzle gas distributor, Određivanje zapreminskog koeficijenta prenosa mase ozona u barbotažnoj koloni sa dvofluidnom mlaznicom",
volume = "69",
number = "5",
pages = "553-559",
doi = "10.2298/HEMIND140716075D"
}

Đeković-Šević, M., Bošković-Vragolović, N., Takić, L., Garić Grulović, R.,& Pejanović, S.. (2015). Determination of the ozone volumetric mass transfer coefficient in bubble column with two-fluid nozzle gas distributor. in Hemijska industrija
Association of Chemical Engineers of Serbia., 69(5), 553-559.
https://doi.org/10.2298/HEMIND140716075D

Đeković-Šević M, Bošković-Vragolović N, Takić L, Garić Grulović R, Pejanović S. Determination of the ozone volumetric mass transfer coefficient in bubble column with two-fluid nozzle gas distributor. in Hemijska industrija. 2015;69(5):553-559.
doi:10.2298/HEMIND140716075D .

Đeković-Šević, Milica, Bošković-Vragolović, Nevenka, Takić, Ljiljana, Garić Grulović, Radmila, Pejanović, Srđan, "Determination of the ozone volumetric mass transfer coefficient in bubble column with two-fluid nozzle gas distributor" in Hemijska industrija, 69, no. 5 (2015):553-559,
https://doi.org/10.2298/HEMIND140716075D . .

TY  - JOUR
AU  - Pešić, Radojica
AU  - Kaluđerović-Radoičić, Tatjana
AU  - Bošković-Vragolović, Nevenka
AU  - Arsenijević, Zorana
AU  - Grbavčić, Željko
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1732
AB  - The aim of this work was the experimental investigation of the particle friction factor for air flow through a packed bed of particles at ambient and elevated temperatures. The experiments were performed by measuring the pressure drop across the packed bed, heated to the desired temperature by hot air. Glass spherical particles of seven different diameters were used. The temperature range of the air flowing through the packed bed was from 20 to 350°C and the bed voidages were from 0.3574 to 0.4303. The obtained results were correlated using a number of available literature correlations. The overall best fit of all of the experimental data was obtained using the Ergun equation, with mean absolute deviation of 10.90%. Ergun's equation gave somewhat better results in correlating the data at ambient temperature with mean absolute deviation of 9.77%, while correlation of the data at elevated temperatures gave mean absolute deviation of 12.38%. The vast majority of the correlations used gave better results when applied to ambient temperature data than to the data at elevated temperatures. Based on the results obtained, the Ergun equation is proposed for friction factor calculation both at ambient and at elevated temperatures.
AB  - Cilj ovog rada je bio eksperimentalno ispitivanje koeficijenta trenja fluid-čestice prilikom strujanja vazduha kroz pakovani sloj čestica, na sobnoj i povišenim temperaturama. Izvršeno je eksperimentalno merenje pada pritiska u pakovanim slojevima različitih temperatura zagrejanih korišćenjem vrelog vazduha. Kao materijal za pakovanje korišćene su sferične staklene kuglice 7 različitih prečnika. Temperaturni interval u kom su vršeni eksperimenti bio je od 20 do 350°C, dok su poroznosti sloja iznosile od 0,3574 do 0,4303. Dobijeni rezultati korelisani su korišćenjem većeg broja literaturnih korelacija. Najbolje slaganje sa eksperimentalnim podacima pokazala je Ergunova jednačina [1], sa srednjim procentnim odstupanjem od 10,90%. Ergunova jednačina je dala bolje rezultate prilikom korelisanja podataka na sobnoj temperaturi (srednja procentna greška 9,77%), dok je korelisanje podataka na povišenim temperaturama izvršeno sa greškom od 12,38%. Većina testiranih literaturnih korelacija je dala bolje rezultate pri korelisanju podataka dobijenih na sobnoj temperaturi u odnosu na podatke dobijene na povišenim temperaturama. Na osnovu dobijenih rezultata, predlaže se korišćenje Ergunove jednačine za izračunavanje koeficijenta trenja fluid-čestice kako na sobnoj, tako i na povišenim temperaturama.
PB  - Association of the Chemical Engineers of Serbia
T2  - Chemical Industry and Chemical Engineering Quarterly / CICEQ
T1  - Pressure drop in packed beds of spherical particles at ambient and elevated air temperatures
T1  - Pad pritiska u pakovanom sloju sferičnih čestica na sobnoj i povišenim temperaturama
VL  - 21
IS  - 3
SP  - 419
EP  - 427
DO  - 10.2298/CICEQ140618044P
ER  - 

@article{
author = "Pešić, Radojica and Kaluđerović-Radoičić, Tatjana and Bošković-Vragolović, Nevenka and Arsenijević, Zorana and Grbavčić, Željko",
year = "2015",
abstract = "The aim of this work was the experimental investigation of the particle friction factor for air flow through a packed bed of particles at ambient and elevated temperatures. The experiments were performed by measuring the pressure drop across the packed bed, heated to the desired temperature by hot air. Glass spherical particles of seven different diameters were used. The temperature range of the air flowing through the packed bed was from 20 to 350°C and the bed voidages were from 0.3574 to 0.4303. The obtained results were correlated using a number of available literature correlations. The overall best fit of all of the experimental data was obtained using the Ergun equation, with mean absolute deviation of 10.90%. Ergun's equation gave somewhat better results in correlating the data at ambient temperature with mean absolute deviation of 9.77%, while correlation of the data at elevated temperatures gave mean absolute deviation of 12.38%. The vast majority of the correlations used gave better results when applied to ambient temperature data than to the data at elevated temperatures. Based on the results obtained, the Ergun equation is proposed for friction factor calculation both at ambient and at elevated temperatures., Cilj ovog rada je bio eksperimentalno ispitivanje koeficijenta trenja fluid-čestice prilikom strujanja vazduha kroz pakovani sloj čestica, na sobnoj i povišenim temperaturama. Izvršeno je eksperimentalno merenje pada pritiska u pakovanim slojevima različitih temperatura zagrejanih korišćenjem vrelog vazduha. Kao materijal za pakovanje korišćene su sferične staklene kuglice 7 različitih prečnika. Temperaturni interval u kom su vršeni eksperimenti bio je od 20 do 350°C, dok su poroznosti sloja iznosile od 0,3574 do 0,4303. Dobijeni rezultati korelisani su korišćenjem većeg broja literaturnih korelacija. Najbolje slaganje sa eksperimentalnim podacima pokazala je Ergunova jednačina [1], sa srednjim procentnim odstupanjem od 10,90%. Ergunova jednačina je dala bolje rezultate prilikom korelisanja podataka na sobnoj temperaturi (srednja procentna greška 9,77%), dok je korelisanje podataka na povišenim temperaturama izvršeno sa greškom od 12,38%. Većina testiranih literaturnih korelacija je dala bolje rezultate pri korelisanju podataka dobijenih na sobnoj temperaturi u odnosu na podatke dobijene na povišenim temperaturama. Na osnovu dobijenih rezultata, predlaže se korišćenje Ergunove jednačine za izračunavanje koeficijenta trenja fluid-čestice kako na sobnoj, tako i na povišenim temperaturama.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Chemical Industry and Chemical Engineering Quarterly / CICEQ",
title = "Pressure drop in packed beds of spherical particles at ambient and elevated air temperatures, Pad pritiska u pakovanom sloju sferičnih čestica na sobnoj i povišenim temperaturama",
volume = "21",
number = "3",
pages = "419-427",
doi = "10.2298/CICEQ140618044P"
}

Pešić, R., Kaluđerović-Radoičić, T., Bošković-Vragolović, N., Arsenijević, Z.,& Grbavčić, Ž.. (2015). Pressure drop in packed beds of spherical particles at ambient and elevated air temperatures. in Chemical Industry and Chemical Engineering Quarterly / CICEQ
Association of the Chemical Engineers of Serbia., 21(3), 419-427.
https://doi.org/10.2298/CICEQ140618044P

Pešić R, Kaluđerović-Radoičić T, Bošković-Vragolović N, Arsenijević Z, Grbavčić Ž. Pressure drop in packed beds of spherical particles at ambient and elevated air temperatures. in Chemical Industry and Chemical Engineering Quarterly / CICEQ. 2015;21(3):419-427.
doi:10.2298/CICEQ140618044P .

Pešić, Radojica, Kaluđerović-Radoičić, Tatjana, Bošković-Vragolović, Nevenka, Arsenijević, Zorana, Grbavčić, Željko, "Pressure drop in packed beds of spherical particles at ambient and elevated air temperatures" in Chemical Industry and Chemical Engineering Quarterly / CICEQ, 21, no. 3 (2015):419-427,
https://doi.org/10.2298/CICEQ140618044P . .

TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Garić Grulović, Radmila
AU  - Grbavčić, Željko
AU  - Bošković-Vragolović, Nevenka
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1759
AB  - Wall-to-bed heat transfer in particulate fluidized beds of spherical particles was studied. Experiments were performed using spherical glass particles of 0.80-2.98 mm in diameter with water in a 25.4 mm I.D. copper tube equipped with a steam jacket. Heat transfer data related to the fluid-particle interphase drag coefficient were obtained and compared with previous results for wall-to-bed mass transfer in fluidized beds [Bogkovit et aL, Powder Technol., 79 (1994) 217]. All the data for momentum, heat and mass transfer in particulate fluidized beds of spherical particles, showed the existence of an analogy among these three phenomena.
PB  - Elsevier
T2  - Powder Technology
T1  - Analogy between momentum and heat transfer in liquid-solid fluidized beds
VL  - 274
SP  - 213
EP  - 216
DO  - 10.1016/j.powtec.2014.11.010
ER  - 

@article{
author = "Jaćimovski, Darko and Garić Grulović, Radmila and Grbavčić, Željko and Bošković-Vragolović, Nevenka",
year = "2015",
abstract = "Wall-to-bed heat transfer in particulate fluidized beds of spherical particles was studied. Experiments were performed using spherical glass particles of 0.80-2.98 mm in diameter with water in a 25.4 mm I.D. copper tube equipped with a steam jacket. Heat transfer data related to the fluid-particle interphase drag coefficient were obtained and compared with previous results for wall-to-bed mass transfer in fluidized beds [Bogkovit et aL, Powder Technol., 79 (1994) 217]. All the data for momentum, heat and mass transfer in particulate fluidized beds of spherical particles, showed the existence of an analogy among these three phenomena.",
publisher = "Elsevier",
journal = "Powder Technology",
title = "Analogy between momentum and heat transfer in liquid-solid fluidized beds",
volume = "274",
pages = "213-216",
doi = "10.1016/j.powtec.2014.11.010"
}

Jaćimovski, D., Garić Grulović, R., Grbavčić, Ž.,& Bošković-Vragolović, N.. (2015). Analogy between momentum and heat transfer in liquid-solid fluidized beds. in Powder Technology
Elsevier., 274, 213-216.
https://doi.org/10.1016/j.powtec.2014.11.010

Jaćimovski D, Garić Grulović R, Grbavčić Ž, Bošković-Vragolović N. Analogy between momentum and heat transfer in liquid-solid fluidized beds. in Powder Technology. 2015;274:213-216.
doi:10.1016/j.powtec.2014.11.010 .

Jaćimovski, Darko, Garić Grulović, Radmila, Grbavčić, Željko, Bošković-Vragolović, Nevenka, "Analogy between momentum and heat transfer in liquid-solid fluidized beds" in Powder Technology, 274 (2015):213-216,
https://doi.org/10.1016/j.powtec.2014.11.010 . .

TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Garić Grulović, Radmila
AU  - Grbavčić, Željko
AU  - Bošković-Vragolović, Nevenka
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3199
AB  - Wall-to-bed heat transfer in particulate fluidized beds of spherical particles was studied. Experiments were performed using spherical glass particles of 0.80-2.98 mm in diameter with water in a 25.4 mm I.D. copper tube equipped with a steam jacket. Heat transfer data related to the fluid-particle interphase drag coefficient were obtained and compared with previous results for wall-to-bed mass transfer in fluidized beds [Bogkovit et aL, Powder Technol., 79 (1994) 217]. All the data for momentum, heat and mass transfer in particulate fluidized beds of spherical particles, showed the existence of an analogy among these three phenomena.
PB  - Elsevier
T2  - Powder Technology
T1  - Analogy between momentum and heat transfer in liquid-solid fluidized beds
VL  - 274
SP  - 213
EP  - 216
DO  - 10.1016/j.powtec.2014.11.010
ER  - 

@article{
author = "Jaćimovski, Darko and Garić Grulović, Radmila and Grbavčić, Željko and Bošković-Vragolović, Nevenka",
year = "2015",
abstract = "Wall-to-bed heat transfer in particulate fluidized beds of spherical particles was studied. Experiments were performed using spherical glass particles of 0.80-2.98 mm in diameter with water in a 25.4 mm I.D. copper tube equipped with a steam jacket. Heat transfer data related to the fluid-particle interphase drag coefficient were obtained and compared with previous results for wall-to-bed mass transfer in fluidized beds [Bogkovit et aL, Powder Technol., 79 (1994) 217]. All the data for momentum, heat and mass transfer in particulate fluidized beds of spherical particles, showed the existence of an analogy among these three phenomena.",
publisher = "Elsevier",
journal = "Powder Technology",
title = "Analogy between momentum and heat transfer in liquid-solid fluidized beds",
volume = "274",
pages = "213-216",
doi = "10.1016/j.powtec.2014.11.010"
}

Jaćimovski, D., Garić Grulović, R., Grbavčić, Ž.,& Bošković-Vragolović, N.. (2015). Analogy between momentum and heat transfer in liquid-solid fluidized beds. in Powder Technology
Elsevier., 274, 213-216.
https://doi.org/10.1016/j.powtec.2014.11.010

Jaćimovski D, Garić Grulović R, Grbavčić Ž, Bošković-Vragolović N. Analogy between momentum and heat transfer in liquid-solid fluidized beds. in Powder Technology. 2015;274:213-216.
doi:10.1016/j.powtec.2014.11.010 .

Jaćimovski, Darko, Garić Grulović, Radmila, Grbavčić, Željko, Bošković-Vragolović, Nevenka, "Analogy between momentum and heat transfer in liquid-solid fluidized beds" in Powder Technology, 274 (2015):213-216,
https://doi.org/10.1016/j.powtec.2014.11.010 . .

TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Garić Grulović, Radmila
AU  - Grbavčić, Željko
AU  - Đuriš, Mihal
AU  - Bošković-Vragolović, Nevenka
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1465
AB  - Wall-to-bed momentum, heat and mass transfer in the vertical liquid-solids flow, as well as in the single phase flow, were studied. The aim of this investigation was to establish the analogy among those phenomena. Also, effect of particle concentration on momentum, heat and mass transfer was studied. The experiments in hydraulic transport were performed in 25.4 mm I.D. cooper tube equipped with a steam jacket, using spherical glass particles of 1.94 mm in diameter and water as a transport fluid. The segment of the transport tube used for mass transfer measurements had internal coating made of benzoic acid. In the hydraulic transport two characteristic flow regimes were observed: turbulent and parallel particle flow regime. The transition between two characteristic regimes (Y* = 0), occurs at a critical voidage ε ≈ 0.85. The vertical two-phase flow was con­sidered as the pseudofluid, and modified mixture-wall friction coefficient (fw) and modified mixture Reynolds number (Rem) were introduced for system characterization. Experimental data show that the wall-to-bed momentum, heat and mass transfer coefficients, in vertical flow of pseudofluid, for the turbulent regime are significantly higher than in parallel regime. Wall-to-bed, mass and heat transfer coefficients in hydraulic transport of particles were much higher than in single-phase flow for lower Reynolds numbers (Re  LT  15000), while for high Reynolds numbers (Re > 15000), there was not significant difference. The experimental data for wall-to-bed momentum, heat and mass transfer in vertical flow of pseudofluid in parallel particle flow regime, verify analogy among these three phenomena.
AB  - U ovom radu prikazani su rezultati eksperimentalnih ispitivanja prenosa količine kretanja, toplote i mase zid-fluid u vertikalnom hidrauličkom transportu inertnih čestica i pri strujanju fluida u cevi istog prečnika. Eksperimentalna ispitivanja vršena su istovremenim merenjem potrebnih parametara za definisanje navedenih prenosa. Cilj ovih ispitivanja bio je određivanje koeficijenata prenosa pri vertikalnom hidrauličkom transportu inertnih čestica i uspostavljanje analogije tri prenosa. Eksperimentalni sistem predstavljala je vertikalna transportna cev prečnika 25,4 mm snabdevena omotačem za zagrevanje parom, kao i segmentom transportne cevi prepariranim rastopom benzoeve kiseline. Kao fluid korišćena je voda, a vršen je transport staklenih sfernih čestica prečnika 1,94 mm. U rezultatima su prikazani dobijeni koeficijenti trenja, prelaza toplote i prelaza mase. Korišćenjem koncepta pseudofluida, pokazano je postojanje analogije prenosa količine kretanja, toplote i mase u transportnoj cevi za paralelni režim strujanja.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Momentum, heat, and mass transfer analogy for vertical hydraulic transport of inert particles
T1  - Analogija prenosa količine kretanja, toplote i mase pri vertikalnom hidrauličkom transportu inertnih čestica
VL  - 68
IS  - 1
SP  - 15
EP  - 25
DO  - 10.2298/HEMIND130207025J
ER  - 

@article{
author = "Jaćimovski, Darko and Garić Grulović, Radmila and Grbavčić, Željko and Đuriš, Mihal and Bošković-Vragolović, Nevenka",
year = "2014",
abstract = "Wall-to-bed momentum, heat and mass transfer in the vertical liquid-solids flow, as well as in the single phase flow, were studied. The aim of this investigation was to establish the analogy among those phenomena. Also, effect of particle concentration on momentum, heat and mass transfer was studied. The experiments in hydraulic transport were performed in 25.4 mm I.D. cooper tube equipped with a steam jacket, using spherical glass particles of 1.94 mm in diameter and water as a transport fluid. The segment of the transport tube used for mass transfer measurements had internal coating made of benzoic acid. In the hydraulic transport two characteristic flow regimes were observed: turbulent and parallel particle flow regime. The transition between two characteristic regimes (Y* = 0), occurs at a critical voidage ε ≈ 0.85. The vertical two-phase flow was con­sidered as the pseudofluid, and modified mixture-wall friction coefficient (fw) and modified mixture Reynolds number (Rem) were introduced for system characterization. Experimental data show that the wall-to-bed momentum, heat and mass transfer coefficients, in vertical flow of pseudofluid, for the turbulent regime are significantly higher than in parallel regime. Wall-to-bed, mass and heat transfer coefficients in hydraulic transport of particles were much higher than in single-phase flow for lower Reynolds numbers (Re  LT  15000), while for high Reynolds numbers (Re > 15000), there was not significant difference. The experimental data for wall-to-bed momentum, heat and mass transfer in vertical flow of pseudofluid in parallel particle flow regime, verify analogy among these three phenomena., U ovom radu prikazani su rezultati eksperimentalnih ispitivanja prenosa količine kretanja, toplote i mase zid-fluid u vertikalnom hidrauličkom transportu inertnih čestica i pri strujanju fluida u cevi istog prečnika. Eksperimentalna ispitivanja vršena su istovremenim merenjem potrebnih parametara za definisanje navedenih prenosa. Cilj ovih ispitivanja bio je određivanje koeficijenata prenosa pri vertikalnom hidrauličkom transportu inertnih čestica i uspostavljanje analogije tri prenosa. Eksperimentalni sistem predstavljala je vertikalna transportna cev prečnika 25,4 mm snabdevena omotačem za zagrevanje parom, kao i segmentom transportne cevi prepariranim rastopom benzoeve kiseline. Kao fluid korišćena je voda, a vršen je transport staklenih sfernih čestica prečnika 1,94 mm. U rezultatima su prikazani dobijeni koeficijenti trenja, prelaza toplote i prelaza mase. Korišćenjem koncepta pseudofluida, pokazano je postojanje analogije prenosa količine kretanja, toplote i mase u transportnoj cevi za paralelni režim strujanja.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Momentum, heat, and mass transfer analogy for vertical hydraulic transport of inert particles, Analogija prenosa količine kretanja, toplote i mase pri vertikalnom hidrauličkom transportu inertnih čestica",
volume = "68",
number = "1",
pages = "15-25",
doi = "10.2298/HEMIND130207025J"
}

Jaćimovski, D., Garić Grulović, R., Grbavčić, Ž., Đuriš, M.,& Bošković-Vragolović, N.. (2014). Momentum, heat, and mass transfer analogy for vertical hydraulic transport of inert particles. in Hemijska industrija
Association of Chemical Engineers of Serbia., 68(1), 15-25.
https://doi.org/10.2298/HEMIND130207025J

Jaćimovski D, Garić Grulović R, Grbavčić Ž, Đuriš M, Bošković-Vragolović N. Momentum, heat, and mass transfer analogy for vertical hydraulic transport of inert particles. in Hemijska industrija. 2014;68(1):15-25.
doi:10.2298/HEMIND130207025J .

Jaćimovski, Darko, Garić Grulović, Radmila, Grbavčić, Željko, Đuriš, Mihal, Bošković-Vragolović, Nevenka, "Momentum, heat, and mass transfer analogy for vertical hydraulic transport of inert particles" in Hemijska industrija, 68, no. 1 (2014):15-25,
https://doi.org/10.2298/HEMIND130207025J . .

TY  - JOUR
AU  - Pesic, Radojica
AU  - Kaluđerović-Radoičić, Tatjana
AU  - Bošković-Vragolović, Nevenka
AU  - Arsenijević, Zorana
AU  - Grbavčić, Željko
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1437
AB  - In this paper, heat transfer coefficients between the hot packed beds of particles and the larger cold immersed sphere were experimentally determined. The packed beds consisted of mono-sized spherical glass particles of d(p), = 1.2, 1.94 and 2.98 mm. The aluminum test spheres of D-p = 6, 12 and 20 mm with K-type (Ni/A1) thermocouples inserted in them were immersed into the bed. The temperatures of the test spheres were recorded until the thermal equilibrium was reached. From these recordings, heat transfer coefficients were determined. The experiments were performed in the range of gas superficial velocity of similar to 0.3-0.8 m/s and the bed temperature from 90 to 320 degrees C. It was found that the measured heat transfer coefficients increased with the increase in gas superficial velocity, while only a slight increase with temperature was observed for test spheres D-p = 6 and 12 mm in the investigated temperature interval. The heat transfer coefficients were generally larger for smaller test spheres, while they did not show significant dependence on the size of the bed particles. The literature correlations for heat transfer coefficients in packed beds in form of Nusselt number and heat transfer factor j(H) were compared to experimental data from this work. The correlations proposed by Collier et al. (2004) [18] and Handley and Heggs (1968) [2] fit our experimental data best. The mean error between the experimentally determined heat transfer coefficients and the ones calculated from Collier et al. (2004) [18] correlation was 12.7%.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - International Journal of Heat and Mass Transfer
T1  - Heat transfer between a packed bed and a larger immersed spherical particle
VL  - 78
SP  - 130
EP  - 136
DO  - 10.1016/j.ijheatmasstransfer.2014.06.040
ER  - 

@article{
author = "Pesic, Radojica and Kaluđerović-Radoičić, Tatjana and Bošković-Vragolović, Nevenka and Arsenijević, Zorana and Grbavčić, Željko",
year = "2014",
abstract = "In this paper, heat transfer coefficients between the hot packed beds of particles and the larger cold immersed sphere were experimentally determined. The packed beds consisted of mono-sized spherical glass particles of d(p), = 1.2, 1.94 and 2.98 mm. The aluminum test spheres of D-p = 6, 12 and 20 mm with K-type (Ni/A1) thermocouples inserted in them were immersed into the bed. The temperatures of the test spheres were recorded until the thermal equilibrium was reached. From these recordings, heat transfer coefficients were determined. The experiments were performed in the range of gas superficial velocity of similar to 0.3-0.8 m/s and the bed temperature from 90 to 320 degrees C. It was found that the measured heat transfer coefficients increased with the increase in gas superficial velocity, while only a slight increase with temperature was observed for test spheres D-p = 6 and 12 mm in the investigated temperature interval. The heat transfer coefficients were generally larger for smaller test spheres, while they did not show significant dependence on the size of the bed particles. The literature correlations for heat transfer coefficients in packed beds in form of Nusselt number and heat transfer factor j(H) were compared to experimental data from this work. The correlations proposed by Collier et al. (2004) [18] and Handley and Heggs (1968) [2] fit our experimental data best. The mean error between the experimentally determined heat transfer coefficients and the ones calculated from Collier et al. (2004) [18] correlation was 12.7%.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "International Journal of Heat and Mass Transfer",
title = "Heat transfer between a packed bed and a larger immersed spherical particle",
volume = "78",
pages = "130-136",
doi = "10.1016/j.ijheatmasstransfer.2014.06.040"
}

Pesic, R., Kaluđerović-Radoičić, T., Bošković-Vragolović, N., Arsenijević, Z.,& Grbavčić, Ž.. (2014). Heat transfer between a packed bed and a larger immersed spherical particle. in International Journal of Heat and Mass Transfer
Oxford : Pergamon-Elsevier Science Ltd., 78, 130-136.
https://doi.org/10.1016/j.ijheatmasstransfer.2014.06.040

Pesic R, Kaluđerović-Radoičić T, Bošković-Vragolović N, Arsenijević Z, Grbavčić Ž. Heat transfer between a packed bed and a larger immersed spherical particle. in International Journal of Heat and Mass Transfer. 2014;78:130-136.
doi:10.1016/j.ijheatmasstransfer.2014.06.040 .

Pesic, Radojica, Kaluđerović-Radoičić, Tatjana, Bošković-Vragolović, Nevenka, Arsenijević, Zorana, Grbavčić, Željko, "Heat transfer between a packed bed and a larger immersed spherical particle" in International Journal of Heat and Mass Transfer, 78 (2014):130-136,
https://doi.org/10.1016/j.ijheatmasstransfer.2014.06.040 . .

TY  - JOUR
AU  - Bošković-Vragolović, Nevenka
AU  - Garić Grulović, Radmila
AU  - Pjanović, Rada
AU  - Grbavčić, Željko
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1294
AB  - Mass transfer coefficient in single phase flow around short cylinder, has been studied experimentally using adsorption method. Experiments were conducted in "two-dimensional" column 140 x 10 x 200 mm. The mass transfer data were obtained by studying transfer for flow past single cylinder, 30 mm in diameter. This paper, also, discusses the possibilities of application of the adsorption method for fluid flow visualization. Local and average mass transfer coefficients were determined from color intensity on the surface of foils of silica gel. Experimental correlations for Sh = f (Re) and j(D) = f (Re) were established using mass transfer coefficients data.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - International Journal of Heat and Mass Transfer
T1  - Mass transfer and fluid flow visualization for single cylinder by the adsorption method
VL  - 59
SP  - 155
EP  - 160
DO  - 10.1016/j.ijheatmasstransfer.2012.11.077
ER  - 

@article{
author = "Bošković-Vragolović, Nevenka and Garić Grulović, Radmila and Pjanović, Rada and Grbavčić, Željko",
year = "2013",
abstract = "Mass transfer coefficient in single phase flow around short cylinder, has been studied experimentally using adsorption method. Experiments were conducted in "two-dimensional" column 140 x 10 x 200 mm. The mass transfer data were obtained by studying transfer for flow past single cylinder, 30 mm in diameter. This paper, also, discusses the possibilities of application of the adsorption method for fluid flow visualization. Local and average mass transfer coefficients were determined from color intensity on the surface of foils of silica gel. Experimental correlations for Sh = f (Re) and j(D) = f (Re) were established using mass transfer coefficients data.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "International Journal of Heat and Mass Transfer",
title = "Mass transfer and fluid flow visualization for single cylinder by the adsorption method",
volume = "59",
pages = "155-160",
doi = "10.1016/j.ijheatmasstransfer.2012.11.077"
}

Bošković-Vragolović, N., Garić Grulović, R., Pjanović, R.,& Grbavčić, Ž.. (2013). Mass transfer and fluid flow visualization for single cylinder by the adsorption method. in International Journal of Heat and Mass Transfer
Oxford : Pergamon-Elsevier Science Ltd., 59, 155-160.
https://doi.org/10.1016/j.ijheatmasstransfer.2012.11.077

Bošković-Vragolović N, Garić Grulović R, Pjanović R, Grbavčić Ž. Mass transfer and fluid flow visualization for single cylinder by the adsorption method. in International Journal of Heat and Mass Transfer. 2013;59:155-160.
doi:10.1016/j.ijheatmasstransfer.2012.11.077 .

Bošković-Vragolović, Nevenka, Garić Grulović, Radmila, Pjanović, Rada, Grbavčić, Željko, "Mass transfer and fluid flow visualization for single cylinder by the adsorption method" in International Journal of Heat and Mass Transfer, 59 (2013):155-160,
https://doi.org/10.1016/j.ijheatmasstransfer.2012.11.077 . .

TY  - JOUR
AU  - Pjanović, Rada
AU  - Bošković-Vragolović, Nevenka
AU  - Veljkovic-Giga, Jelena
AU  - Garić Grulović, Radmila
AU  - Pejanović, Srđan
AU  - Bugarski, Branko
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/661
AB  - BACKGROUND: The mass transfer of model drugs Lidocaine hydrochloride and Dihydroquercetin from hydrogels (the usual carriers for topical drugs), and hydrogels containing liposomes, as novel drug vehicles, was studied. Diffusion experiments were performed using a Franz diffusion cell. Experimental data were used to calculate drug diffusion coefficients across membranes, and their effective diffusion coefficients from hydrogels and liposome containing hydrogels. For the first time the diffusion resistance of all drug carriers was determined from corresponding diffusion coefficients. The main aim of this work was the study of drug diffusion coefficients from liposomes and their comparison with related diffusion coefficients from hydrogels to find how liposomes contribute to prolonged and controlled drug release. RESULTS: Drug diffusion coefficients were: 1.38 . 10(-8)-m(2) s(-1) for Lidocaine hydrochloride and 5.96 . 10(-9)m(-2) s(-1) for Dihydroquercetin, while corresponding effective diffusion coefficients from hydrogels were: 7.82 . 10(-10)m(2) s(-1) and 7.98 . 10(-10)m(2) s(-1), respectively. Effective diffusion coefficients from liposome-containing hydrogels were:4.82 . 10(-10)m(2) s(-1) (Lidocaine hydrochloride) and 4.305 . 10(-10)m(2) s(-1) (Dihydroquercetin). Diffusion resistances for the two hydrogels were almost the same. Very similar values of diffusion resistances for all liposome dispersions were obtained. CONCLUSION: Calculated diffusion coefficients and resistances demonstrate that liposomes, as drug carriers, significantly affect diffusion rates. The results obtained could be used whenever diffusion-controlled drug release is required.
PB  - John Wiley & Sons Ltd, Chichester
T2  - Journal of Chemical Technology and Biotechnology
T1  - Diffusion of drugs from hydrogels and liposomes as drug carriers
VL  - 85
IS  - 5
SP  - 693
EP  - 698
DO  - 10.1002/jctb.2357
ER  - 

@article{
author = "Pjanović, Rada and Bošković-Vragolović, Nevenka and Veljkovic-Giga, Jelena and Garić Grulović, Radmila and Pejanović, Srđan and Bugarski, Branko",
year = "2010",
abstract = "BACKGROUND: The mass transfer of model drugs Lidocaine hydrochloride and Dihydroquercetin from hydrogels (the usual carriers for topical drugs), and hydrogels containing liposomes, as novel drug vehicles, was studied. Diffusion experiments were performed using a Franz diffusion cell. Experimental data were used to calculate drug diffusion coefficients across membranes, and their effective diffusion coefficients from hydrogels and liposome containing hydrogels. For the first time the diffusion resistance of all drug carriers was determined from corresponding diffusion coefficients. The main aim of this work was the study of drug diffusion coefficients from liposomes and their comparison with related diffusion coefficients from hydrogels to find how liposomes contribute to prolonged and controlled drug release. RESULTS: Drug diffusion coefficients were: 1.38 . 10(-8)-m(2) s(-1) for Lidocaine hydrochloride and 5.96 . 10(-9)m(-2) s(-1) for Dihydroquercetin, while corresponding effective diffusion coefficients from hydrogels were: 7.82 . 10(-10)m(2) s(-1) and 7.98 . 10(-10)m(2) s(-1), respectively. Effective diffusion coefficients from liposome-containing hydrogels were:4.82 . 10(-10)m(2) s(-1) (Lidocaine hydrochloride) and 4.305 . 10(-10)m(2) s(-1) (Dihydroquercetin). Diffusion resistances for the two hydrogels were almost the same. Very similar values of diffusion resistances for all liposome dispersions were obtained. CONCLUSION: Calculated diffusion coefficients and resistances demonstrate that liposomes, as drug carriers, significantly affect diffusion rates. The results obtained could be used whenever diffusion-controlled drug release is required.",
publisher = "John Wiley & Sons Ltd, Chichester",
journal = "Journal of Chemical Technology and Biotechnology",
title = "Diffusion of drugs from hydrogels and liposomes as drug carriers",
volume = "85",
number = "5",
pages = "693-698",
doi = "10.1002/jctb.2357"
}

Pjanović, R., Bošković-Vragolović, N., Veljkovic-Giga, J., Garić Grulović, R., Pejanović, S.,& Bugarski, B.. (2010). Diffusion of drugs from hydrogels and liposomes as drug carriers. in Journal of Chemical Technology and Biotechnology
John Wiley & Sons Ltd, Chichester., 85(5), 693-698.
https://doi.org/10.1002/jctb.2357

Pjanović R, Bošković-Vragolović N, Veljkovic-Giga J, Garić Grulović R, Pejanović S, Bugarski B. Diffusion of drugs from hydrogels and liposomes as drug carriers. in Journal of Chemical Technology and Biotechnology. 2010;85(5):693-698.
doi:10.1002/jctb.2357 .

Pjanović, Rada, Bošković-Vragolović, Nevenka, Veljkovic-Giga, Jelena, Garić Grulović, Radmila, Pejanović, Srđan, Bugarski, Branko, "Diffusion of drugs from hydrogels and liposomes as drug carriers" in Journal of Chemical Technology and Biotechnology, 85, no. 5 (2010):693-698,
https://doi.org/10.1002/jctb.2357 . .

TY  - JOUR
AU  - Arsenijević, Zorana
AU  - Grbavčić, Željko
AU  - Garić Grulović, Radmila
AU  - Bošković-Vragolović, Nevenka
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/721
AB  - Experimental results were obtained on the steady settling of spheres in quiescent media in a range of cylindrical tubes to ascertain the wall effects over a relatively wide range of Reynolds number values. For practical considerations, the retardation effect is important when the ratio of the particle diameter to the tube diameter (lambda) is higher than about 0.05. A new empirical correlation is presented which covers a Reynolds number range Re = 53-15,100 and a particle to tube diameter ratio lambda LT 0.88. The absolute mean deviation between the experimental data and the presented correlation was 1.9%. The well-known correlations of Newton, Munroe and Di Felice agree with the presented data reasonably well. For steady settling of spheres in a counter-current water flow, the slip velocity remains practically the same as in quiescent media. However, for rising spheres in a co-current water flow, the slip velocity decreases with increasing co-current water velocity, i.e., the wall factor decreases with increasing co-current water velocity. Consequently, the drag coefficient for rising particles in co-current water flow increases with increasing water velocity.
PB  - Elsevier Science Sa, Lausanne
T2  - Powder Technology
T1  - Wall effects on the velocities of a single sphere settling in a stagnant and counter-current fluid and rising in a co-current fluid
VL  - 203
IS  - 2
SP  - 237
EP  - 242
DO  - 10.1016/j.powtec.2010.05.013
ER  - 

@article{
author = "Arsenijević, Zorana and Grbavčić, Željko and Garić Grulović, Radmila and Bošković-Vragolović, Nevenka",
year = "2010",
abstract = "Experimental results were obtained on the steady settling of spheres in quiescent media in a range of cylindrical tubes to ascertain the wall effects over a relatively wide range of Reynolds number values. For practical considerations, the retardation effect is important when the ratio of the particle diameter to the tube diameter (lambda) is higher than about 0.05. A new empirical correlation is presented which covers a Reynolds number range Re = 53-15,100 and a particle to tube diameter ratio lambda LT 0.88. The absolute mean deviation between the experimental data and the presented correlation was 1.9%. The well-known correlations of Newton, Munroe and Di Felice agree with the presented data reasonably well. For steady settling of spheres in a counter-current water flow, the slip velocity remains practically the same as in quiescent media. However, for rising spheres in a co-current water flow, the slip velocity decreases with increasing co-current water velocity, i.e., the wall factor decreases with increasing co-current water velocity. Consequently, the drag coefficient for rising particles in co-current water flow increases with increasing water velocity.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Powder Technology",
title = "Wall effects on the velocities of a single sphere settling in a stagnant and counter-current fluid and rising in a co-current fluid",
volume = "203",
number = "2",
pages = "237-242",
doi = "10.1016/j.powtec.2010.05.013"
}

Arsenijević, Z., Grbavčić, Ž., Garić Grulović, R.,& Bošković-Vragolović, N.. (2010). Wall effects on the velocities of a single sphere settling in a stagnant and counter-current fluid and rising in a co-current fluid. in Powder Technology
Elsevier Science Sa, Lausanne., 203(2), 237-242.
https://doi.org/10.1016/j.powtec.2010.05.013

Arsenijević Z, Grbavčić Ž, Garić Grulović R, Bošković-Vragolović N. Wall effects on the velocities of a single sphere settling in a stagnant and counter-current fluid and rising in a co-current fluid. in Powder Technology. 2010;203(2):237-242.
doi:10.1016/j.powtec.2010.05.013 .

Arsenijević, Zorana, Grbavčić, Željko, Garić Grulović, Radmila, Bošković-Vragolović, Nevenka, "Wall effects on the velocities of a single sphere settling in a stagnant and counter-current fluid and rising in a co-current fluid" in Powder Technology, 203, no. 2 (2010):237-242,
https://doi.org/10.1016/j.powtec.2010.05.013 . .

TY  - JOUR
AU  - Bošković-Vragolović, Nevenka
AU  - Garić Grulović, Radmila
AU  - Grbavčić, Željko
AU  - Pjanović, Rada
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/523
AB  - A mass transfer coefficient between: A liquid and single sphere and a liquid And a column wall in packed and fluidized beds of a spherical inert Particle have been studied experimentally using the adsorption method. The experiments were conducted in a column 40 mm in diameter for packed and fluidized beds, and in a two-dimensional column 140 mm×10 mm for the flow past single sphere. In all runs, the mass transfer rates were determined in the presence of spherical glass particles, 3 mm in diameter, for packed and fluidized beds. The mass transfer data were obtained by studying transfer for flow past single sphere, 20 mm in diameter. This paper discusses the possibilities of application of the adsorption method for fluid flow visualization. Local and average mass transfer coefficients were determined from the color intensity of the surface of the foils of silica gel. Correlations, Sh = f(Re) and jD = f(Re), were derived using the mass transfer coefficient data.
PB  - Association of the Chemical Engineers of Serbia
T2  - Chemical Industry and Chemical Engineering Quarterly / CICEQ
T1  - A mass transfer heterogeneous in systems by the adsorption method
VL  - 15
IS  - 1
SP  - 25
EP  - 28
DO  - 10.2298/CICEQ0901025B
ER  - 

@article{
author = "Bošković-Vragolović, Nevenka and Garić Grulović, Radmila and Grbavčić, Željko and Pjanović, Rada",
year = "2009",
abstract = "A mass transfer coefficient between: A liquid and single sphere and a liquid And a column wall in packed and fluidized beds of a spherical inert Particle have been studied experimentally using the adsorption method. The experiments were conducted in a column 40 mm in diameter for packed and fluidized beds, and in a two-dimensional column 140 mm×10 mm for the flow past single sphere. In all runs, the mass transfer rates were determined in the presence of spherical glass particles, 3 mm in diameter, for packed and fluidized beds. The mass transfer data were obtained by studying transfer for flow past single sphere, 20 mm in diameter. This paper discusses the possibilities of application of the adsorption method for fluid flow visualization. Local and average mass transfer coefficients were determined from the color intensity of the surface of the foils of silica gel. Correlations, Sh = f(Re) and jD = f(Re), were derived using the mass transfer coefficient data.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Chemical Industry and Chemical Engineering Quarterly / CICEQ",
title = "A mass transfer heterogeneous in systems by the adsorption method",
volume = "15",
number = "1",
pages = "25-28",
doi = "10.2298/CICEQ0901025B"
}

Bošković-Vragolović, N., Garić Grulović, R., Grbavčić, Ž.,& Pjanović, R.. (2009). A mass transfer heterogeneous in systems by the adsorption method. in Chemical Industry and Chemical Engineering Quarterly / CICEQ
Association of the Chemical Engineers of Serbia., 15(1), 25-28.
https://doi.org/10.2298/CICEQ0901025B

Bošković-Vragolović N, Garić Grulović R, Grbavčić Ž, Pjanović R. A mass transfer heterogeneous in systems by the adsorption method. in Chemical Industry and Chemical Engineering Quarterly / CICEQ. 2009;15(1):25-28.
doi:10.2298/CICEQ0901025B .

Bošković-Vragolović, Nevenka, Garić Grulović, Radmila, Grbavčić, Željko, Pjanović, Rada, "A mass transfer heterogeneous in systems by the adsorption method" in Chemical Industry and Chemical Engineering Quarterly / CICEQ, 15, no. 1 (2009):25-28,
https://doi.org/10.2298/CICEQ0901025B . .

TY  - CONF
AU  - Bošković-Vragolović, Nevenka
AU  - Garić Grulović, Radmila
AU  - Grbavčić, Željko
AU  - Pjanović, Rada
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/573
AB  - Mass transfer coefficient (j D ) between fluid and column wall in liquid packed and fluidized beds of spherical inert particle has been studied experimentally using adsorption method. Experiments were conducted in column 40 mm in diameter for packed and fluidized beds. In all runs mass transfer rates were determined in presence of spherical glass particles 2.06 mm in diameter. This paper introduced adsorption method as very suitable method for studies of mass transfer and for fluid flow visualization. The adsorption method is based on the dynamic adsorption of an organic dye onto a surface covered with a thin layer of a porous adsorbent. Local and average mass transfer coefficients were determinated from the surface color intensity of the foils of silica gel. Correlation j D = f(Re) was derived using mass transfer coefficients data.
PB  - Maik Nauka/Interperiodica/Springer, New York
C3  - Russian Journal of Physical Chemistry A
T1  - Mass transfer and fluid flow visualization in packed and fluidized beds by the adsorption method
VL  - 83
IS  - 9
SP  - 1550
EP  - 1553
DO  - 10.1134/S0036024409090246
ER  - 

@conference{
author = "Bošković-Vragolović, Nevenka and Garić Grulović, Radmila and Grbavčić, Željko and Pjanović, Rada",
year = "2009",
abstract = "Mass transfer coefficient (j D ) between fluid and column wall in liquid packed and fluidized beds of spherical inert particle has been studied experimentally using adsorption method. Experiments were conducted in column 40 mm in diameter for packed and fluidized beds. In all runs mass transfer rates were determined in presence of spherical glass particles 2.06 mm in diameter. This paper introduced adsorption method as very suitable method for studies of mass transfer and for fluid flow visualization. The adsorption method is based on the dynamic adsorption of an organic dye onto a surface covered with a thin layer of a porous adsorbent. Local and average mass transfer coefficients were determinated from the surface color intensity of the foils of silica gel. Correlation j D = f(Re) was derived using mass transfer coefficients data.",
publisher = "Maik Nauka/Interperiodica/Springer, New York",
journal = "Russian Journal of Physical Chemistry A",
title = "Mass transfer and fluid flow visualization in packed and fluidized beds by the adsorption method",
volume = "83",
number = "9",
pages = "1550-1553",
doi = "10.1134/S0036024409090246"
}

Bošković-Vragolović, N., Garić Grulović, R., Grbavčić, Ž.,& Pjanović, R.. (2009). Mass transfer and fluid flow visualization in packed and fluidized beds by the adsorption method. in Russian Journal of Physical Chemistry A
Maik Nauka/Interperiodica/Springer, New York., 83(9), 1550-1553.
https://doi.org/10.1134/S0036024409090246

Bošković-Vragolović N, Garić Grulović R, Grbavčić Ž, Pjanović R. Mass transfer and fluid flow visualization in packed and fluidized beds by the adsorption method. in Russian Journal of Physical Chemistry A. 2009;83(9):1550-1553.
doi:10.1134/S0036024409090246 .

Bošković-Vragolović, Nevenka, Garić Grulović, Radmila, Grbavčić, Željko, Pjanović, Rada, "Mass transfer and fluid flow visualization in packed and fluidized beds by the adsorption method" in Russian Journal of Physical Chemistry A, 83, no. 9 (2009):1550-1553,
https://doi.org/10.1134/S0036024409090246 . .

TY  - JOUR
AU  - Garić Grulović, Radmila
AU  - Grbavčić, Željko
AU  - Bošković-Vragolović, Nevenka
AU  - Arsenijević, Zorana
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/606
AB  - Wall-to-bed mass transfer in the hydraulic transport of spherical glass particles was studied. The experiments were performed by transporting spherical glass particles 1.20, 1.94 and 2.98 mm in diameter with water in a 25.4 mm I.D. tube. The mass transfer coefficients were determined by following rate of dissolution of a segment of the transport tube prepared from benzoic acid. In the runs in hydraulic transport, the Reynolds number of the tube varied between 1826 and 27597. The loading ratio (Gp/Gf) was between 0.026 and 0.474, and the fluid superficial velocity was between 0.267 · Ut and 4.904 · Ut, where Ut represents the single particle terminal velocity. For these ratios, the voidage ranged from 0.7123 to 0.9228. Also, wall-to-bed mass transfer in the single phase flow regime was studied. In the runs without particles, the Reynolds number of the tube varied between 122 and 39132. The data for the mass transfer factor (jD) in single phase flow are correlated for turbulent flow regime, using the Chilton-Colburn's type equations, jD = f(Re). Those investigations were conducted in aim to compare with results for wall-to-bed mass transfer in hydraulic transport. The data for wall-to-bed mass transfer (jD) in hydraulic transport of spherical particles were correlated by treating the flowing fluid-particle suspension as a pseudofluid, by introducing a modified suspension-wall friction coefficient (fw) and a modified Reynolds number (Rem). The data for wall-to-bed mass transfer in the hydraulic transport of particles show that an analogy between mass and momentum transfer exists.
T2  - Powder Technology
T1  - Mass transfer in vertical liquid-solids flow of coarse particles
VL  - 189
IS  - 1
SP  - 130
EP  - 136
DO  - 10.1016/j.powtec.2008.06.010
ER  - 

@article{
author = "Garić Grulović, Radmila and Grbavčić, Željko and Bošković-Vragolović, Nevenka and Arsenijević, Zorana",
year = "2009",
abstract = "Wall-to-bed mass transfer in the hydraulic transport of spherical glass particles was studied. The experiments were performed by transporting spherical glass particles 1.20, 1.94 and 2.98 mm in diameter with water in a 25.4 mm I.D. tube. The mass transfer coefficients were determined by following rate of dissolution of a segment of the transport tube prepared from benzoic acid. In the runs in hydraulic transport, the Reynolds number of the tube varied between 1826 and 27597. The loading ratio (Gp/Gf) was between 0.026 and 0.474, and the fluid superficial velocity was between 0.267 · Ut and 4.904 · Ut, where Ut represents the single particle terminal velocity. For these ratios, the voidage ranged from 0.7123 to 0.9228. Also, wall-to-bed mass transfer in the single phase flow regime was studied. In the runs without particles, the Reynolds number of the tube varied between 122 and 39132. The data for the mass transfer factor (jD) in single phase flow are correlated for turbulent flow regime, using the Chilton-Colburn's type equations, jD = f(Re). Those investigations were conducted in aim to compare with results for wall-to-bed mass transfer in hydraulic transport. The data for wall-to-bed mass transfer (jD) in hydraulic transport of spherical particles were correlated by treating the flowing fluid-particle suspension as a pseudofluid, by introducing a modified suspension-wall friction coefficient (fw) and a modified Reynolds number (Rem). The data for wall-to-bed mass transfer in the hydraulic transport of particles show that an analogy between mass and momentum transfer exists.",
journal = "Powder Technology",
title = "Mass transfer in vertical liquid-solids flow of coarse particles",
volume = "189",
number = "1",
pages = "130-136",
doi = "10.1016/j.powtec.2008.06.010"
}

Garić Grulović, R., Grbavčić, Ž., Bošković-Vragolović, N.,& Arsenijević, Z.. (2009). Mass transfer in vertical liquid-solids flow of coarse particles. in Powder Technology, 189(1), 130-136.
https://doi.org/10.1016/j.powtec.2008.06.010

Garić Grulović R, Grbavčić Ž, Bošković-Vragolović N, Arsenijević Z. Mass transfer in vertical liquid-solids flow of coarse particles. in Powder Technology. 2009;189(1):130-136.
doi:10.1016/j.powtec.2008.06.010 .

Garić Grulović, Radmila, Grbavčić, Željko, Bošković-Vragolović, Nevenka, Arsenijević, Zorana, "Mass transfer in vertical liquid-solids flow of coarse particles" in Powder Technology, 189, no. 1 (2009):130-136,
https://doi.org/10.1016/j.powtec.2008.06.010 . .

TY  - JOUR
AU  - Garić Grulović, Radmila
AU  - Bošković-Vragolović, Nevenka
AU  - Grbavčić, Željko
AU  - Arsenijević, Zorana
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/387
AB  - Wall-to-bed heat transfer in hydraulic transport and in particulate fluidized beds of spherical particles was studied. Experiments were performed by spherical glass particles of 0.80-2.98 mm in diameter with water in a 25.4 mm I.D. cooper tube equipped with a steam jacket. In the hydraulic transport runs the Reynolds number varied between 3300 and 20150 (particles of 1.20,1.94 and 2.98 mm in diameter), while in particulate fluidized beds Reynolds number varied between 1960 and 7850 (particles of 0.80, 1.10 and 1.94 mm in diameter). The influence of different parameters as liquid velocity, particles size and voidage on heat transfer in fluidized beds and in hydraulic transport are presented. In our hydraulic transport experiments, the two characteristic flow regimes were observed: "turbulent" and "parallel" flow. Our experimental data show that the heat transfer coefficients in "turbulent" regime are much higher then in "parallel" flow, and the heat transfer coefficients is generally higher while the flow is in fluidized bed. The data for heat transfer in particulate fluidized beds and for vertical hydraulic transport were correlated treating the flowing fluid-particle mixture as a pseudo fluid. New correlation for heat transfer factor in fluidized beds and in vertical hydraulic transport is proposed.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - International Journal of Heat and Mass Transfer
T1  - Wall-to-bed heat transfer in vertical hydraulic transport and in particulate fluidized beds
VL  - 51
IS  - 25-26
SP  - 5942
EP  - 5948
DO  - 10.1016/j.ijheatmasstransfer.2008.03.030
ER  - 

@article{
author = "Garić Grulović, Radmila and Bošković-Vragolović, Nevenka and Grbavčić, Željko and Arsenijević, Zorana",
year = "2008",
abstract = "Wall-to-bed heat transfer in hydraulic transport and in particulate fluidized beds of spherical particles was studied. Experiments were performed by spherical glass particles of 0.80-2.98 mm in diameter with water in a 25.4 mm I.D. cooper tube equipped with a steam jacket. In the hydraulic transport runs the Reynolds number varied between 3300 and 20150 (particles of 1.20,1.94 and 2.98 mm in diameter), while in particulate fluidized beds Reynolds number varied between 1960 and 7850 (particles of 0.80, 1.10 and 1.94 mm in diameter). The influence of different parameters as liquid velocity, particles size and voidage on heat transfer in fluidized beds and in hydraulic transport are presented. In our hydraulic transport experiments, the two characteristic flow regimes were observed: "turbulent" and "parallel" flow. Our experimental data show that the heat transfer coefficients in "turbulent" regime are much higher then in "parallel" flow, and the heat transfer coefficients is generally higher while the flow is in fluidized bed. The data for heat transfer in particulate fluidized beds and for vertical hydraulic transport were correlated treating the flowing fluid-particle mixture as a pseudo fluid. New correlation for heat transfer factor in fluidized beds and in vertical hydraulic transport is proposed.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "International Journal of Heat and Mass Transfer",
title = "Wall-to-bed heat transfer in vertical hydraulic transport and in particulate fluidized beds",
volume = "51",
number = "25-26",
pages = "5942-5948",
doi = "10.1016/j.ijheatmasstransfer.2008.03.030"
}

Garić Grulović, R., Bošković-Vragolović, N., Grbavčić, Ž.,& Arsenijević, Z.. (2008). Wall-to-bed heat transfer in vertical hydraulic transport and in particulate fluidized beds. in International Journal of Heat and Mass Transfer
Oxford : Pergamon-Elsevier Science Ltd., 51(25-26), 5942-5948.
https://doi.org/10.1016/j.ijheatmasstransfer.2008.03.030

Garić Grulović R, Bošković-Vragolović N, Grbavčić Ž, Arsenijević Z. Wall-to-bed heat transfer in vertical hydraulic transport and in particulate fluidized beds. in International Journal of Heat and Mass Transfer. 2008;51(25-26):5942-5948.
doi:10.1016/j.ijheatmasstransfer.2008.03.030 .

Garić Grulović, Radmila, Bošković-Vragolović, Nevenka, Grbavčić, Željko, Arsenijević, Zorana, "Wall-to-bed heat transfer in vertical hydraulic transport and in particulate fluidized beds" in International Journal of Heat and Mass Transfer, 51, no. 25-26 (2008):5942-5948,
https://doi.org/10.1016/j.ijheatmasstransfer.2008.03.030 . .

TY  - JOUR
AU  - Bošković-Vragolović, Nevenka
AU  - Garić Grulović, Radmila
AU  - Grbavčić, Željko
PY  - 2007
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/304
AB  - Mass transfer coefficients in single phase flow, liquid fluidized beds and vertical hydraulic transport of spherical inert particles were studied experimentally using 40 mm and 25.4 mm diameter columns. The mass transfer data were obtained by studying the transfer of benzoic acid from a tube segment to water using the dissolution method. In all runs, the mass transfer rates were determined in the presence of spherical glass particles 1.2, 1.94 and 2.98 mm in diameter. The influence of different parameters, such as liquid velocity, particles size and voids on mass transfer in fluidized beds and hydraulic transport are presented. The data for mass transfer in all the investigated systems are shown using the Sherwood number (Sh) and mass transfer factor - Colburn factor (jD) - as a function of Reynolds number (Re) for the particles and for the column. The data for mass transfer in particulate fluidized beds and for vertical hydraulic transport of spherical particles were correlated by treating the flowing fluid-particle mixture as a pseudo fluid by introducing a modified mixture Reynolds number (Rem). A new correlation for the mass transfer factor in fluidized beds and in vertical hydraulic transport is proposed.
AB  - U ovom radu je eksperimentalno ispitivan prelaz mase između zida i fluida pri strujanju fluida kroz kolonu i u prisustvu fluidizovanih sfernih inertnih čestica i čestica u transportu. Za određivanje koeficijenta prelaza mase korišćena je metoda praćenja rastvaranja slabo rastvorne supstance - benzoeve kiseline - sa dela zida kolone u vodi. Korišćene su kolone prečnika 40 mm i 25,4 mm, a kao inertne čestice korišćene su staklene sfere prečnika 1,2; 1,94 i 2,98 mm. Prikazani su uticaji različitih parametara kao što su brzina fluida, veličina čestica i poroznost sloja na koeficijent prelaza mase u fluidizovanim slojevima i pri vertikalnom transportu čestica. Eksperimentalni rezultati su prikazani u obliku zavisnosti Šervudovog broja i faktora prenosa mase od Rejnoldsovih brojeva za kolonu i čestice. Uvedena je i veličina pseudofluid koja tretira dvofazni sistem tečnost-čestice kao suspenziju odakle je proistekao modifikovani Rejnoldsov broj mešanja. Uvođenjem ovih veličina data je i završna eksperimentalna korelacija, jedinstvena za fluidizovane slojeve i vertikalni transport čestica. .
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Wall-to-liquid mass transfer in fluidized beds and vertical transport of inert particles
T1  - Prenos mase zid-fluid u fluidizovanim slojevima i pri vertikalnom transportu inertnih čestica
VL  - 72
IS  - 11
SP  - 1103
EP  - 1113
DO  - 10.2298/JSC0711103B
ER  - 

@article{
author = "Bošković-Vragolović, Nevenka and Garić Grulović, Radmila and Grbavčić, Željko",
year = "2007",
abstract = "Mass transfer coefficients in single phase flow, liquid fluidized beds and vertical hydraulic transport of spherical inert particles were studied experimentally using 40 mm and 25.4 mm diameter columns. The mass transfer data were obtained by studying the transfer of benzoic acid from a tube segment to water using the dissolution method. In all runs, the mass transfer rates were determined in the presence of spherical glass particles 1.2, 1.94 and 2.98 mm in diameter. The influence of different parameters, such as liquid velocity, particles size and voids on mass transfer in fluidized beds and hydraulic transport are presented. The data for mass transfer in all the investigated systems are shown using the Sherwood number (Sh) and mass transfer factor - Colburn factor (jD) - as a function of Reynolds number (Re) for the particles and for the column. The data for mass transfer in particulate fluidized beds and for vertical hydraulic transport of spherical particles were correlated by treating the flowing fluid-particle mixture as a pseudo fluid by introducing a modified mixture Reynolds number (Rem). A new correlation for the mass transfer factor in fluidized beds and in vertical hydraulic transport is proposed., U ovom radu je eksperimentalno ispitivan prelaz mase između zida i fluida pri strujanju fluida kroz kolonu i u prisustvu fluidizovanih sfernih inertnih čestica i čestica u transportu. Za određivanje koeficijenta prelaza mase korišćena je metoda praćenja rastvaranja slabo rastvorne supstance - benzoeve kiseline - sa dela zida kolone u vodi. Korišćene su kolone prečnika 40 mm i 25,4 mm, a kao inertne čestice korišćene su staklene sfere prečnika 1,2; 1,94 i 2,98 mm. Prikazani su uticaji različitih parametara kao što su brzina fluida, veličina čestica i poroznost sloja na koeficijent prelaza mase u fluidizovanim slojevima i pri vertikalnom transportu čestica. Eksperimentalni rezultati su prikazani u obliku zavisnosti Šervudovog broja i faktora prenosa mase od Rejnoldsovih brojeva za kolonu i čestice. Uvedena je i veličina pseudofluid koja tretira dvofazni sistem tečnost-čestice kao suspenziju odakle je proistekao modifikovani Rejnoldsov broj mešanja. Uvođenjem ovih veličina data je i završna eksperimentalna korelacija, jedinstvena za fluidizovane slojeve i vertikalni transport čestica. .",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Wall-to-liquid mass transfer in fluidized beds and vertical transport of inert particles, Prenos mase zid-fluid u fluidizovanim slojevima i pri vertikalnom transportu inertnih čestica",
volume = "72",
number = "11",
pages = "1103-1113",
doi = "10.2298/JSC0711103B"
}

Bošković-Vragolović, N., Garić Grulović, R.,& Grbavčić, Ž.. (2007). Wall-to-liquid mass transfer in fluidized beds and vertical transport of inert particles. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 72(11), 1103-1113.
https://doi.org/10.2298/JSC0711103B

Bošković-Vragolović N, Garić Grulović R, Grbavčić Ž. Wall-to-liquid mass transfer in fluidized beds and vertical transport of inert particles. in Journal of the Serbian Chemical Society. 2007;72(11):1103-1113.
doi:10.2298/JSC0711103B .

Bošković-Vragolović, Nevenka, Garić Grulović, Radmila, Grbavčić, Željko, "Wall-to-liquid mass transfer in fluidized beds and vertical transport of inert particles" in Journal of the Serbian Chemical Society, 72, no. 11 (2007):1103-1113,
https://doi.org/10.2298/JSC0711103B . .