Modeling of co-current and counter-current bubble columns with an extended EMMS approach  

作　　者：Xiaoping Guan Ning Yang 

机构地区：[1]State Key Laboratory of Multi-phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, P.O. Box 353, Beijing 100190, China

出　　处：《Particuology》2019年第3期126-135,共10页颗粒学报（英文版）

基　　金：The authors acknowledge the long-term support from the National Key R&D Program of China (2017YFB0602500);the National Natural Science Foundation of China (91634203, 21808222);Beijing Natural Science Foundation (2184125);the Research Center for Mesoscience at Institute of Process Engineering (COM2016A004);the Strategic Priority Research Program (XDA21030700), Chinese Academy of Sciences.

摘　　要：Bubble columns can be operated in semi-batch, co-current or counter-current mode. This study attempts to extend the dual-bubble-size (DBS) model, viz., the energy-minimization multi-scale (EMMS) model for gas-liquid systems, to co-current and counter-current bubble columns. With the increase of superficial liquid velocity, the predicted total gas holdup and regime transition are in accordance with experiments. A DBS drag model was then developed and incorporated into the CFD simulation. The total gas holdup and local gas holdup radial distribution in both the co-current and counter-current bubble columns are well estimated. The findings in the present work demonstrate that developing closure laws through the stability condition is of great significance in modeling complicated multi-scale flow in bubble columns.

关 键 词：CO-CURRENT COUNTER-CURRENT BUBBLE COLUMNS CFD Drag model 

分 类 号：O3[理学—力学]