DICP OpenIR
Subject Area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)
KeywordMicrochannel Hydrodynamics Taylor Flow Bubble Microreactor
Source PublicationCHEMICAL ENGINEERING JOURNAL
2013-05-01
DOI10.1016/j.cej.2013.02.108
Volume223Pages:99-109
Indexed BySCI
SubtypeArticle
Department9
Funding Project903
Contribution Rank1,1
WOS HeadingsScience & Technology ; Technology
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS Research AreaEngineering
WOS KeywordMICROFLUIDIC T-JUNCTION ; SQUARE CROSS-SECTION ; LIQUID 2-PHASE FLOW ; SEGMENTED FLOW ; MASS-TRANSFER ; CIRCULAR CAPILLARIES ; CFD SIMULATIONS ; TRAIN FLOW ; SLUG FLOW ; GAS
AbstractThe 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.
Language英语
WOS IDWOS:000320631200012
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/117563
Collection中国科学院大连化学物理研究所
Corresponding AuthorChen GW(陈光文)
Affiliation1.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
Recommended Citation
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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