Wall effects on the velocities of a single sphere settling in a stagnant and counter-current fluid and rising in a co-current fluid
Само за регистроване кориснике
2010
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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 fac...tor decreases with increasing co-current water velocity. Consequently, the drag coefficient for rising particles in co-current water flow increases with increasing water velocity.
Кључне речи:
Wall effects / Drag coefficient / Spherical particle / Terminal settling velocity / Rising velocityИзвор:
Powder Technology, 2010, 203, 2, 237-242Издавач:
- Elsevier Science Sa, Lausanne
Финансирање / пројекти:
- Research Council of Serbia
DOI: 10.1016/j.powtec.2010.05.013
ISSN: 0032-5910
WoS: 000281461700013
Scopus: 2-s2.0-77955509438
Институција/група
IHTMTY - 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 . .