Formation characteristics of Taylor bubbles in a microchannel with a converging shape mixing junction

	Formation characteristics of Taylor bubbles in a microchannel with a converging shape mixing junction
	Dang, Minhui 1,2; Yue, Jun 1; Chen, Guangwen 1; Yuan, Quan 1
刊名	chemical engineering journal
	2013-05-01
卷号	223 页码:99-109
关键词	Microchannel Hydrodynamics Taylor flow Bubble Microreactor
通讯作者	陈光文
产权排序	1,1
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.
学科主题	物理化学
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000320631200012
公开日期	2013-10-11
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/117563]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
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.(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.