Multi-scale analysis of gas-liquid interaction and CFD simulation of gas-liquid flow in bubble columns

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	Multi-scale analysis of gas-liquid interaction and CFD simulation of gas-liquid flow in bubble columns
	Yang, Ning 1; Wu, Zongying 1,2; Chen, Jianhua 1,3; Wang, Yuhua 1,3; Li, Jinghai 1
刊名	CHEMICAL ENGINEERING SCIENCE
	2011-07-15
卷号	66 期号:14 页码:3212-3222
关键词	Bubble columns Hydrodynamics Multiphase flow Simulation CFD Multi-scale
ISSN号	0009-2509
通讯作者	Yang, N
英文摘要	The 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.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	STABILITY CONDITION ; REGIME TRANSITION ; COMPLEX-SYSTEMS ; FLUIDIZED-BED ; MODEL ; DYNAMICS ; SIZE
收录类别	SCI ; ISTP
语种	英语
WOS记录号	WOS:000291475000015
公开日期	2013-11-05
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/4864]
专题	过程工程研究所_多相复杂系统国家重点实验室
作者单位	1.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
推荐引用方式 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.(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.