Coarse-grained CFD-DEM study of Gas-solid flow in gas cyclone

被引：23

作者：

Chu, Kaiwei ^{[1
,4
,5
]}

Chen, Yanxing ^{[2
]}

Ji, Li ^{[3
]}

Zhou, Zongqing ^{[1
]}

Yu, Aibing ^{[4
,5
]}

Chen, Jiang ^{[4
,5
]}

机构：

[1] Shandong Univ, Sch Qilu Transportat, Jinan 250002, Peoples R China

[2] Xian Univ Architecture & Technolody, Sch Mat Sci & Engn, Inst Powder Engn, Xian 710055, Peoples R China

[3] Shandong Univ, Sch Mech Engn, Jinan 250002, Peoples R China

[4] Monash Univ, Dept Chem Engn, Clayton, Vic 3800, Australia

[5] Jiangsu Ind Technol Res Inst JITRI, Inst Proc Engn, Nanjing 210000, Peoples R China

来源：

CHEMICAL ENGINEERING SCIENCE | 2022年 / 260卷

基金：

中国国家自然科学基金;

关键词：

Gas cyclone separator; Coarse-grained; Computational Fluid Dynamics; Discrete Element Method; Dust ceiling; DISCRETE PARTICLE SIMULATION; NUMERICAL-SIMULATION; PARTICULATE SYSTEMS; PRESSURE-DROP; FLUIDIZED-BED; MODEL; PERFORMANCE; HYDRODYNAMICS; COHESIONLESS; TRANSPORT;

D O I：

10.1016/j.ces.2022.117906

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

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 mu m) 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. (C) 2022 Elsevier Ltd. All rights reserved.

引用

页数：17

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