Prediction of interphase drag coefficient and bed expansion using a variational model for fluidization of small spherical particles
Само за регистроване кориснике
2020
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
In this study, we applied the variational model to fluidization of small spherical particles. Fluidization experiments were carried out for spherical particles with 13 diameters between d(p) = 0.13 and 5.00 mm. We propose a generalized form of our variational model to predict the superficial velocity U and interphase drag coefficient beta by introducing an exponent n to describe the different dependences of the drag force F-d on fluid velocity for different particle sizes (different flow regimes). By comparing the predictions with the experimental results, we conclude that n=1 should be used for small particles (d(p) lt 1 mm) and n = 2 for larger particles (d(p) gt 1 mm). This conclusion is generalized by proposing n = 1 for particles with Re-t lt 160 and n = 2 for particles with Re-t gt 160. The average mean absolute error was 5.49% in calculating superficial velocity for different bed voidages using the modified variational model for all of the particles examined. The calcula...ted values of beta were compared with values of literature models for particles with d(p) lt 1.0 mm. The average mean absolute error of the modified variational model was 8.02% in calculating beta for different bed voidages for all of the particles examined.
Кључне речи:
Calculus of variations / Isoperimetric problem / Bed expansion / Drag coefficient / Fluidization / Spherical particlesИзвор:
Particuology, 2020, 51, 184-192Издавач:
- Elsevier Science Inc, New York
Финансирање / пројекти:
- Развој ефикаснијих хемијско-инжењерских процеса заснован на истраживањима феномена преноса и принципима интензификације процеса (RS-MESTD-Basic Research (BR or ON)-172022)
DOI: 10.1016/j.partic.2019.11.002
ISSN: 1674-2001
WoS: 000524974900019
Scopus: 2-s2.0-85077152147
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Đuriš, Mihal AU - Arsenijević, Zorana AU - Garić-Grulović, Radmila AU - Kaluđerović-Radoičić, Tatjana PY - 2020 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4462 AB - In this study, we applied the variational model to fluidization of small spherical particles. Fluidization experiments were carried out for spherical particles with 13 diameters between d(p) = 0.13 and 5.00 mm. We propose a generalized form of our variational model to predict the superficial velocity U and interphase drag coefficient beta by introducing an exponent n to describe the different dependences of the drag force F-d on fluid velocity for different particle sizes (different flow regimes). By comparing the predictions with the experimental results, we conclude that n=1 should be used for small particles (d(p) lt 1 mm) and n = 2 for larger particles (d(p) gt 1 mm). This conclusion is generalized by proposing n = 1 for particles with Re-t lt 160 and n = 2 for particles with Re-t gt 160. The average mean absolute error was 5.49% in calculating superficial velocity for different bed voidages using the modified variational model for all of the particles examined. The calculated values of beta were compared with values of literature models for particles with d(p) lt 1.0 mm. The average mean absolute error of the modified variational model was 8.02% in calculating beta for different bed voidages for all of the particles examined. PB - Elsevier Science Inc, New York T2 - Particuology T1 - Prediction of interphase drag coefficient and bed expansion using a variational model for fluidization of small spherical particles EP - 192 SP - 184 VL - 51 DO - 10.1016/j.partic.2019.11.002 ER -
@article{ author = "Đuriš, Mihal and Arsenijević, Zorana and Garić-Grulović, Radmila and Kaluđerović-Radoičić, Tatjana", year = "2020", abstract = "In this study, we applied the variational model to fluidization of small spherical particles. Fluidization experiments were carried out for spherical particles with 13 diameters between d(p) = 0.13 and 5.00 mm. We propose a generalized form of our variational model to predict the superficial velocity U and interphase drag coefficient beta by introducing an exponent n to describe the different dependences of the drag force F-d on fluid velocity for different particle sizes (different flow regimes). By comparing the predictions with the experimental results, we conclude that n=1 should be used for small particles (d(p) lt 1 mm) and n = 2 for larger particles (d(p) gt 1 mm). This conclusion is generalized by proposing n = 1 for particles with Re-t lt 160 and n = 2 for particles with Re-t gt 160. The average mean absolute error was 5.49% in calculating superficial velocity for different bed voidages using the modified variational model for all of the particles examined. The calculated values of beta were compared with values of literature models for particles with d(p) lt 1.0 mm. The average mean absolute error of the modified variational model was 8.02% in calculating beta for different bed voidages for all of the particles examined.", publisher = "Elsevier Science Inc, New York", journal = "Particuology", title = "Prediction of interphase drag coefficient and bed expansion using a variational model for fluidization of small spherical particles", pages = "192-184", volume = "51", doi = "10.1016/j.partic.2019.11.002" }
Đuriš, M., Arsenijević, Z., Garić-Grulović, R.,& Kaluđerović-Radoičić, T.. (2020). Prediction of interphase drag coefficient and bed expansion using a variational model for fluidization of small spherical particles. in Particuology Elsevier Science Inc, New York., 51, 184-192. https://doi.org/10.1016/j.partic.2019.11.002
Đuriš M, Arsenijević Z, Garić-Grulović R, Kaluđerović-Radoičić T. Prediction of interphase drag coefficient and bed expansion using a variational model for fluidization of small spherical particles. in Particuology. 2020;51:184-192. doi:10.1016/j.partic.2019.11.002 .
Đuriš, Mihal, Arsenijević, Zorana, Garić-Grulović, Radmila, Kaluđerović-Radoičić, Tatjana, "Prediction of interphase drag coefficient and bed expansion using a variational model for fluidization of small spherical particles" in Particuology, 51 (2020):184-192, https://doi.org/10.1016/j.partic.2019.11.002 . .