CFD-PBM simulation of bubble columns: Effect of parameters in the class method for solving PBEs

被引：23

作者：

Zhang, Xi-Bao ^{[1
]}

Zheng, Ru-Qiu ^{[1
]}

Luo, Zheng-Hong ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Dept Chem Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

来源：

CHEMICAL ENGINEERING SCIENCE | 2020年 / 226卷

基金：

中国国家自然科学基金;

关键词：

Bubble column; Class method; CFD-PBM; Gas-liquid; Optimum scheme; POPULATION BALANCE MODEL; GAS-LIQUID FLOWS; TURBULENCE MODELS; THEORETICAL-MODEL; SIZE DISTRIBUTION; COUPLED MODEL; BREAKAGE RATE; 2-PHASE FLOW; COALESCENCE; IMPLEMENTATION;

D O I：

10.1016/j.ces.2020.115853

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The class method (CM) has been frequently applied in solving population balance equations (PBEs) for the CFD-PBM simulation of bubble columns. There are four parameters in the CM: the volume ratio between successive bubble classes (r(v)), the minimum diameter (d(min)), the maximum diameter (d(max)) and the critical diameter (d(c)) that is used to distinguish small bubbles and large bubbles. These parameters have a significant impact on the computational precision and efficiency. In this work, numerical simulations are performed to investigate the effects of these parameters on the simulation of two typical bubble columns operated at heterogeneous regime. The simulation results quantitatively present the influences of these parameters on the simulated local gas holdup and global bubble size distribution. The simulated radial profiles of gas holdup at different heights are compared with experimental data. The optimized scheme for the values of these parameters in the CM is proposed. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：14

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