CFD-PBM simulation with EMMS correctors for bubble column reactors

被引：0
|
作者：
Wang J. [1 ,2 ]
Yang N. [1 ]
机构：
[1] State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing
[2] University of Chinese Academy of Sciences, Beijing
来源：
Huagong Xuebao/CIESC Journal | 2017年 / 68卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Bubble column; Bubble size distribution; CFD; Gas holdup; Population balance modeling;
D O I：
10.11949/j.issn.0438-1157.20170025
中图分类号：
学科分类号：
摘要：
The energy-minimization multi-scale (EMMS) model has been introduced to improve the population balance modeling (PBM) of gas-liquid flows. The energy for bubble breakup and coalescence can be obtained from the EMMS model and then used to derive a correction factor for the coalescence rate. This new model is applied in this study to simulate the bubble columns of high flow rates. Simulations using the three different models, namely, the constant-bubble-size model, the CFD-PBM model and the CFD-PBM-EMMS model, are compared with experimental data. The simulation of CFD-PBM-EMMS gives better prediction for bubble size distribution and liquid axial velocity at different heights as well as the overall and local gas holdup. The relative error of global gas holdup reduces to 5% or 15%, and the mean relative error of local gas holdup reduces to 8% or 17% for 0.16 m·s-1 or 0.25 m·s-1 of superficial gas velocity. © All Right Reserved.
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收藏
页码：2667 / 2677
页数：10
相关论文
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