TY - JOUR
T1 - Coarse-grained CFD-DEM study of gas-solid flow in gas cyclone
AU - Chu, Kaiwei
AU - Chen, Yanxing
AU - Ji, Li
AU - Zhou, Zongqing
AU - Yu, Aibing
AU - Chen, Jiang
N1 - Funding Information:
The authors are grateful to the financial support provided by Major Project of National Natural Science Foundation of China ( 51991391 ) and Nature Science Foundation of Jiangsu Province of China (BK20171402).
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/10/12
Y1 - 2022/10/12
N2 - Gas cyclones are common device in various industries to separate solid particles and/or droplets from gas streams. Nonetheless, the mathematical modelling of gas cyclone has been very challenging since huge number of multi-sized particles are involved in the system. In this work, a numerical study of the gas–solid flow in a gas cyclone with wide range of particle size distribution (from 1 to 200 µm) is carried out by developing a coarse-grained combined Discrete Element Method (DEM) and Computational Fluid Dynamics (CFD) model. It shows that the coarse-grained CFD-DEM model is able to capture the typical flow features in a gas cyclone including the solid strands and dust ceiling phenomena. It also shows that modelling of van der Waals force is critical for the prediction of separation efficiency in gas cyclone especially for fine particles. Furthermore, it is tried to explain how the dust ceiling is formed.
AB - Gas cyclones are common device in various industries to separate solid particles and/or droplets from gas streams. Nonetheless, the mathematical modelling of gas cyclone has been very challenging since huge number of multi-sized particles are involved in the system. In this work, a numerical study of the gas–solid flow in a gas cyclone with wide range of particle size distribution (from 1 to 200 µm) is carried out by developing a coarse-grained combined Discrete Element Method (DEM) and Computational Fluid Dynamics (CFD) model. It shows that the coarse-grained CFD-DEM model is able to capture the typical flow features in a gas cyclone including the solid strands and dust ceiling phenomena. It also shows that modelling of van der Waals force is critical for the prediction of separation efficiency in gas cyclone especially for fine particles. Furthermore, it is tried to explain how the dust ceiling is formed.
KW - Coarse-grained
KW - Computational Fluid Dynamics
KW - Discrete Element Method
KW - Dust ceiling
KW - Gas cyclone separator
UR - http://www.scopus.com/inward/record.url?scp=85134679639&partnerID=8YFLogxK
U2 - 10.1016/j.ces.2022.117906
DO - 10.1016/j.ces.2022.117906
M3 - Article
AN - SCOPUS:85134679639
SN - 0009-2509
VL - 260
JO - Chemical Engineering Science
JF - Chemical Engineering Science
M1 - 117906
ER -