Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 62 - 77 |
| Number of pages | 16 |
| Journal | AIChE Journal |
| Volume | 62 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2016 |
Cite this
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CFD-DEM modeling of gas fluidization of fine ellipsoidal particles. / Gan, Jieqing; Zhou, Zongyan; Yu, Aibing.
In: AIChE Journal, Vol. 62, No. 1, 2016, p. 62 - 77.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - CFD-DEM modeling of gas fluidization of fine ellipsoidal particles
AU - Gan, Jieqing
AU - Zhou, Zongyan
AU - Yu, Aibing
PY - 2016
Y1 - 2016
N2 - Particle characteristics are important factors affecting gas fluidization. In this work, the effects of both particle size and shape on fluidization in different flow regimes are studied using the combined computational fluid dynamic–discrete element method approach. The results are first analyzed in terms of flow patterns and fluidization parameters such as pressure drop, minimum fluidization, and bubbling velocities. The results show that with particle size decreasing, agglomerates can be formed for fine ellipsoidal particles. In particular, “chain phenomenon,” a special agglomerate phenomenon exists in expanded and fluidized beds for fine prolate particles, which is caused by the van der Waals force. The minimum fluidization velocity increases exponentially with the increase of particle size, and for a given size, it shows a “W” shape with aspect ratio. A correlation is established to describe the dependence of minimum fluidization velocity on particle size and shape. Ellipsoids have much higher minimum bubbling velocities and fluidization index than spheres.
AB - Particle characteristics are important factors affecting gas fluidization. In this work, the effects of both particle size and shape on fluidization in different flow regimes are studied using the combined computational fluid dynamic–discrete element method approach. The results are first analyzed in terms of flow patterns and fluidization parameters such as pressure drop, minimum fluidization, and bubbling velocities. The results show that with particle size decreasing, agglomerates can be formed for fine ellipsoidal particles. In particular, “chain phenomenon,” a special agglomerate phenomenon exists in expanded and fluidized beds for fine prolate particles, which is caused by the van der Waals force. The minimum fluidization velocity increases exponentially with the increase of particle size, and for a given size, it shows a “W” shape with aspect ratio. A correlation is established to describe the dependence of minimum fluidization velocity on particle size and shape. Ellipsoids have much higher minimum bubbling velocities and fluidization index than spheres.
UR - http://onlinelibrary.wiley.com/doi/10.1002/aic.15050/epdf
U2 - 10.1002/aic.15050
DO - 10.1002/aic.15050
M3 - Article
VL - 62
SP - 62
EP - 77
JO - AIChE Journal
JF - AIChE Journal
SN - 0001-1541
IS - 1
ER -