TY  - CONF
AU  - Tanović, Dragoljub
AU  - Svorcan, Jelena
AU  - Ivanović, Milica
AU  - Vorkapić, Miloš
AU  - Telebak, K
AU  - Stojanović, J
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5678
AB  - The wind speed is one of the major parameter influencing the design of the wind turbine, which varies widely over the different part of the country and globe. So, significant research is going on for the design of wind turbine for low, medium and high wind speed. Currently, many researchers have started designing small-scale horizontal axis wind turbines (HAWT) in world, to adapt their use to households. The advantage is reflected in the simple and affordable construction, uninterrupted operation and satisfactory power that wind turbines create. An airfoil is defined as the cross section of a body that is placed in an airstream in order to produce a useful aerodynamic force in the most efficient manner possible. The cross sections of wings, propeller blades, windmill blades, compressor and turbine blades in a jet engine, and hydrofoils are example of airfoils. A computational study has been conducted on various airfoils to simulate flows at different Reynolds numbers (Re) and wind speed to provide understanding and guidance for other low Reynolds-number designs. The numerical computational method used in this study is a boundary element method (BEM) which is implemented in software Qblade. It is an alternative deterministic method which incorporates a mesh that is only located on the boundaries of the domain and hence are attractive for free surface problems. The airfoils investigated in this study include NACA 4412, NACA 63-415 and S809. Performances such as power, power coefficient and tip speed ratio were compared.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - Program and the Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2022, 05 – 08 July 2022, Zlatibor, Serbia
T1  - The influence of the Reynolds number on the airfoils
SP  - 63
EP  - 63
UR  - https://hdl.handle.net/21.15107/rcub_cer_5678
ER  - 

@conference{
author = "Tanović, Dragoljub and Svorcan, Jelena and Ivanović, Milica and Vorkapić, Miloš and Telebak, K and Stojanović, J",
year = "2022",
abstract = "The wind speed is one of the major parameter influencing the design of the wind turbine, which varies widely over the different part of the country and globe. So, significant research is going on for the design of wind turbine for low, medium and high wind speed. Currently, many researchers have started designing small-scale horizontal axis wind turbines (HAWT) in world, to adapt their use to households. The advantage is reflected in the simple and affordable construction, uninterrupted operation and satisfactory power that wind turbines create. An airfoil is defined as the cross section of a body that is placed in an airstream in order to produce a useful aerodynamic force in the most efficient manner possible. The cross sections of wings, propeller blades, windmill blades, compressor and turbine blades in a jet engine, and hydrofoils are example of airfoils. A computational study has been conducted on various airfoils to simulate flows at different Reynolds numbers (Re) and wind speed to provide understanding and guidance for other low Reynolds-number designs. The numerical computational method used in this study is a boundary element method (BEM) which is implemented in software Qblade. It is an alternative deterministic method which incorporates a mesh that is only located on the boundaries of the domain and hence are attractive for free surface problems. The airfoils investigated in this study include NACA 4412, NACA 63-415 and S809. Performances such as power, power coefficient and tip speed ratio were compared.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "Program and the Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2022, 05 – 08 July 2022, Zlatibor, Serbia",
title = "The influence of the Reynolds number on the airfoils",
pages = "63-63",
url = "https://hdl.handle.net/21.15107/rcub_cer_5678"
}

Tanović, D., Svorcan, J., Ivanović, M., Vorkapić, M., Telebak, K.,& Stojanović, J.. (2022). The influence of the Reynolds number on the airfoils. in Program and the Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2022, 05 – 08 July 2022, Zlatibor, Serbia
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 63-63.
https://hdl.handle.net/21.15107/rcub_cer_5678

Tanović D, Svorcan J, Ivanović M, Vorkapić M, Telebak K, Stojanović J. The influence of the Reynolds number on the airfoils. in Program and the Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2022, 05 – 08 July 2022, Zlatibor, Serbia. 2022;:63-63.
https://hdl.handle.net/21.15107/rcub_cer_5678 .

Tanović, Dragoljub, Svorcan, Jelena, Ivanović, Milica, Vorkapić, Miloš, Telebak, K, Stojanović, J, "The influence of the Reynolds number on the airfoils" in Program and the Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2022, 05 – 08 July 2022, Zlatibor, Serbia (2022):63-63,
https://hdl.handle.net/21.15107/rcub_cer_5678 .

TY  - JOUR
AU  - Milić, Jelena
AU  - Beškoski, Vladimir
AU  - Randjelović, Danijela
AU  - Stojanović, J.
AU  - Vrvić, Miroslav
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/989
AB  - This study visually documents the mechanical contact and interaction between the bacterial cells of two biogeocenotically different strains of Acidithiobacillus ferrooxidans (At. ferrooxidans) and oil shale containing pyrite. Atomic force microscopy (AFM) imaging was used to visualise initial interaction between the microorganisms and the surface minerals of an oil shale and to evaluate bacterial effects in the first hours of the bioleaching process. Acidithiobacillus ferrooxidans was attached to the shale surface already after 2 h, and after 48 h, numerous cells covered the surface with a biofilm. After 5 day incubation with At. ferrooxidans, AFM imaging revealed ellipsoid etched pits that represent footprints left by detached cells. Combining AFM surface imaging and leaching analysis following bacterial colonisation of oil shale layers demonstrates that an initial attachment to the surface is necessary for the leaching and that later on, once a sufficient concentration of Fe2+ ions in the solution is achieved, cells detach to become free cells, and leaching occurs primarily by the Fe3+. This experiment confirmed that microorganisms isolated from sites in which a particular substrate is found will demonstrate stronger binding to that substrate.
PB  - Technical Faculty, Bor-Serbia, Bor
T2  - Journal of Mining and Metallurgy B: Metallurgy
T1  - Visualisation of the interaction between Acidithiobacillus ferrooxidans and oil shale by atomic force microscopy
VL  - 48
IS  - 2
SP  - 207
EP  - 217
DO  - 10.2298/JMMB110923016M
ER  - 

@article{
author = "Milić, Jelena and Beškoski, Vladimir and Randjelović, Danijela and Stojanović, J. and Vrvić, Miroslav",
year = "2012",
abstract = "This study visually documents the mechanical contact and interaction between the bacterial cells of two biogeocenotically different strains of Acidithiobacillus ferrooxidans (At. ferrooxidans) and oil shale containing pyrite. Atomic force microscopy (AFM) imaging was used to visualise initial interaction between the microorganisms and the surface minerals of an oil shale and to evaluate bacterial effects in the first hours of the bioleaching process. Acidithiobacillus ferrooxidans was attached to the shale surface already after 2 h, and after 48 h, numerous cells covered the surface with a biofilm. After 5 day incubation with At. ferrooxidans, AFM imaging revealed ellipsoid etched pits that represent footprints left by detached cells. Combining AFM surface imaging and leaching analysis following bacterial colonisation of oil shale layers demonstrates that an initial attachment to the surface is necessary for the leaching and that later on, once a sufficient concentration of Fe2+ ions in the solution is achieved, cells detach to become free cells, and leaching occurs primarily by the Fe3+. This experiment confirmed that microorganisms isolated from sites in which a particular substrate is found will demonstrate stronger binding to that substrate.",
publisher = "Technical Faculty, Bor-Serbia, Bor",
journal = "Journal of Mining and Metallurgy B: Metallurgy",
title = "Visualisation of the interaction between Acidithiobacillus ferrooxidans and oil shale by atomic force microscopy",
volume = "48",
number = "2",
pages = "207-217",
doi = "10.2298/JMMB110923016M"
}

Milić, J., Beškoski, V., Randjelović, D., Stojanović, J.,& Vrvić, M.. (2012). Visualisation of the interaction between Acidithiobacillus ferrooxidans and oil shale by atomic force microscopy. in Journal of Mining and Metallurgy B: Metallurgy
Technical Faculty, Bor-Serbia, Bor., 48(2), 207-217.
https://doi.org/10.2298/JMMB110923016M

Milić J, Beškoski V, Randjelović D, Stojanović J, Vrvić M. Visualisation of the interaction between Acidithiobacillus ferrooxidans and oil shale by atomic force microscopy. in Journal of Mining and Metallurgy B: Metallurgy. 2012;48(2):207-217.
doi:10.2298/JMMB110923016M .

Milić, Jelena, Beškoski, Vladimir, Randjelović, Danijela, Stojanović, J., Vrvić, Miroslav, "Visualisation of the interaction between Acidithiobacillus ferrooxidans and oil shale by atomic force microscopy" in Journal of Mining and Metallurgy B: Metallurgy, 48, no. 2 (2012):207-217,
https://doi.org/10.2298/JMMB110923016M . .