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Multi-scale analysis of gas-liquid interaction and CFD simulation of gas-liquid flow in bubble columns
Yang, Ning1; Wu, Zongying1,2; Chen, Jianhua1,3; Wang, Yuhua1,3; Li, Jinghai1; Yang, N
2011-07-15
Source PublicationCHEMICAL ENGINEERING SCIENCE
ISSN0009-2509
Volume66Issue:14Pages:3212-3222
AbstractThe ratio of effective drag coefficient to bubble diameter is of critical importance for CFD simulation of gas-liquid flow in bubble columns. In this study, a novel model is proposed to calculate the ratio on the basis of the Dual-Bubble-Size (DBS) model. The motivation of the study is that a stability condition reflecting the compromise between different dominant mechanisms can serve for a closure in addition to mass and momentum conservative constraints, and the interphase momentum transfer should be related to different paths of energy dissipation. With the DBS model, we can first offer a physical interpretation on macro-scale regime transition via the shift of global minimum point of micro-scale energy dissipation from one potential trough to the other. Then the proposed drag model is integrated into a CFD simulation. Prior to this integration, we investigate the respective effects of bubble diameter and correction factor and found that the effect of bubble diameter is limited, whereas the correction factor due to the bubble swarm effect is eminent and appropriate correction factor has to be selected for different correlations of standard drag efficient to be in accord with experiments. By contrast, the DBS drag model can well predict the radial gas holdup distribution, the total gas holdup as well as the two-phase flow field without the need to adjust model parameters, showing its great potential and advantage in understanding the complex nature of multi-scale structure of gas-liquid flow in bubble columns. (C) 2011 Elsevier Ltd. All rights reserved.
KeywordBubble Columns Hydrodynamics Multiphase Flow Simulation Cfd Multi-scale
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.ces.2011.02.029
Indexed BySCI ; ISTP
Language英语
WOS KeywordSTABILITY CONDITION ; REGIME TRANSITION ; COMPLEX-SYSTEMS ; FLUIDIZED-BED ; MODEL ; DYNAMICS ; SIZE
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000291475000015
Citation statistics
Cited Times:76[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/4864
Collection多相复杂系统国家重点实验室
Corresponding AuthorYang, N
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Xi An Jiao Tong Univ, Dept Chem Engn, Xian 710049, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yang, Ning,Wu, Zongying,Chen, Jianhua,et al. Multi-scale analysis of gas-liquid interaction and CFD simulation of gas-liquid flow in bubble columns[J]. CHEMICAL ENGINEERING SCIENCE,2011,66(14):3212-3222.
APA Yang, Ning,Wu, Zongying,Chen, Jianhua,Wang, Yuhua,Li, Jinghai,&Yang, N.(2011).Multi-scale analysis of gas-liquid interaction and CFD simulation of gas-liquid flow in bubble columns.CHEMICAL ENGINEERING SCIENCE,66(14),3212-3222.
MLA Yang, Ning,et al."Multi-scale analysis of gas-liquid interaction and CFD simulation of gas-liquid flow in bubble columns".CHEMICAL ENGINEERING SCIENCE 66.14(2011):3212-3222.
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