文献类型：期刊文献

英文题名：Drag models coupled with CFD-PBM method for simulation in bubble columns

作者：Qi, Mengtong[1];Jia, Xiangfei[1];Chen, Jianpei[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：101

期号：5

起止页码：2963

外文期刊名：CANADIAN JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20225013220582);WOS:【SCI-EXPANDED(收录号:WOS:000888456100001)】；

基金：ACKNOWLEDGEMENT This work was funded by the National Key Research and Development Program Project of China (Grant No.: 2018YFB0604602).

语种：英文

外文关键词：CFD; drag model; gas-liquid flow; PBM

摘要：In this study, three-dimensional numerical simulation of gas-liquid flow in bubble columns was realized by using the computation fluid dynamics (CFD)-population balance model (PBM). The new drag model improves the stability-constrained multi-fluid (SCMF-C) model because of the consideration of the wake accelerating and the hindering effects for calculating the drag correction factor. The gas holdup, axial liquid velocity, and bubble size distribution (BSD) predicted by four drag models at 0.02 and 0.1 m/s were compared. The results revealed that the proposed drag model can provide excellent predictions for both bubbly and heterogeneous flows. Because the wake accelerating and the hindering effects were considered, reliable predictions were achieved for the gas holdup, and the problem of uniform gas holdup distribution was mitigated. Therefore, the SCMF-C model can be extended for nonuniform BSD. The gas holdup and liquid velocity increased, and the nonuniformity of radial results became pronounced at 0.1 m/s. The profiles of four drag models were similar at a low height, whereas the difference between the simulations of the four models became obvious with the variation of heights. The results of the four models were accurate, and the BSD was wide at 0.1 m/s. Subsequently, the feasibility of the four drag models was evaluated at 0.2 and 0.4 m/s. The results of the comparison revealed that the proposed drag model exhibited excellent feasibility at higher gas velocities and was powerful for the simulation of bubble columns.