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学科主题物理化学
Formation characteristics of Taylor bubbles in a microchannel with a converging shape mixing junction
Dang, Minhui1,2; Yue, Jun1; Chen, Guangwen1; Yuan, Quan1; Chen GW(陈光文)
关键词Microchannel Hydrodynamics Taylor Flow Bubble Microreactor
刊名CHEMICAL ENGINEERING JOURNAL
2013-05-01
DOI10.1016/j.cej.2013.02.108
223页:99-109
收录类别SCI
文章类型Article
部门归属9
项目归属903
产权排名1,1
WOS标题词Science & Technology ; Technology
类目[WOS]Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]Engineering
关键词[WOS]MICROFLUIDIC T-JUNCTION ; SQUARE CROSS-SECTION ; LIQUID 2-PHASE FLOW ; SEGMENTED FLOW ; MASS-TRANSFER ; CIRCULAR CAPILLARIES ; CFD SIMULATIONS ; TRAIN FLOW ; SLUG FLOW ; GAS
英文摘要The bubble formation in a square microchannel with a converging shape mixing junction has been investigated under gas-liquid Taylor flow using a high-speed camera. A typical bubble formation process was found to consist of two steps including the expansion and rupture steps. The bubble length could be approximated as the product of the rupture time and two-phase mixture velocity. Significant influence of liquid viscosity and two-phase mixture velocity on the bubble length was observed, although a linear dependence of the bubble length on gas-liquid flow ratio is present for a given two-phase mixture velocity or liquid viscosity. This indicates that shear stress plays an important role in determining the bubble length in the current microfluidic device even at low Capillary numbers where the squeezing regime is expected to predominate. An empirical correlation expressing the bubble length as a function of gas-liquid flow ratio, liquid viscosity and two-phase mixture velocity was developed to describe the experimental results. The bubble frequency was found to reach a maximum as gas-liquid flow ratio is increased from 0.5 to 1. The cross-sectional shape of Taylor bubble was close to be square at low capillary numbers, which is in agreement with the literature results. (C) 2013 Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000320631200012
引用统计
被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/117563
专题中国科学院大连化学物理研究所
通讯作者Chen GW(陈光文)
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Dang, Minhui,Yue, Jun,Chen, Guangwen,et al. Formation characteristics of Taylor bubbles in a microchannel with a converging shape mixing junction[J]. CHEMICAL ENGINEERING JOURNAL,2013,223:99-109.
APA Dang, Minhui,Yue, Jun,Chen, Guangwen,Yuan, Quan,&陈光文.(2013).Formation characteristics of Taylor bubbles in a microchannel with a converging shape mixing junction.CHEMICAL ENGINEERING JOURNAL,223,99-109.
MLA Dang, Minhui,et al."Formation characteristics of Taylor bubbles in a microchannel with a converging shape mixing junction".CHEMICAL ENGINEERING JOURNAL 223(2013):99-109.
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