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题名: An experimental investigation of gas-liquid two-phase flow in single microchannel contactors
作者: Yue, Jun1, 2;  Luo, Lingai1;  Gonthier, Yves1;  Chen, Guangwen2;  Yuan, Quan2
通讯作者: Lingai Luo ;  袁权
关键词: microchannel ;  multiphase now ;  flow pattern ;  Taylor flow ;  pressure drop
刊名: CHEMICAL ENGINEERING SCIENCE
发表日期: 2008-08-16
DOI: 10.1016/j.ces.2008.05.032
卷: 63, 期:16, 页:4189-4202
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, Chemical
研究领域[WOS]: Engineering
英文摘要: This paper describes two-phase flow pattern and pressure drop characteristics during the absorption of CO2 into water in three horizontal microchannel contactors which consist of Y-type rectangular microchannels having hydraulic diameters of 667, 400 and 200 mu m, respectively. With the help of a high-speed photography system, flow patterns such as bubbly flow, slug flow (including two sub-regimes, Taylor flow and unstable slug flow), slug-annular flow, churn flow and annular flow were observed in these microchannels. The applicability of the currently available cot-relations for describing flow pattern transitions in microchannels has been examined. Generally, the predicting performance of these correlations deteriorates as the channel diameter further reduces. Toward solving this discrepancy, an empirical correlation based on the superficial Weber numbers was developed to interpret the transition from Taylor flow to unstable slug flow in three microchannels. Taylor bubble formation process in microchannels was found to be in the squeezing regime at lower superficial liquid velocities (Ca ranging from 0.0019 to 0.029) while the transition to the dripping regime was observed at the highest superficial liquid velocity of 1.0 m/s. Lengths of Taylor bubbles formed in the squeezing regime can be well represented by the scaling relation proposed by Garstecki et al. [Formation of droplets and bubbles in a microfluidic T-junction-scaling and mechanism of break-up. Lab on a Chip, 6, 437-446]. For flow patterns including slug-annular flow, annular flow and churn flow, a simple analysis based on the separated flow model has been performed in order to reveal the observed effect of the superficial liquid velocity on two-phase frictional multiplier in the present microchannels. Then, reasonable correlations for the prediction of two-phase frictional pressure drop under these flow patterns were suggested. (C) 2008 Elsevier Ltd. All rights reserved.
关键词[WOS]: MICROFABRICATED MULTIPHASE REACTORS ;  MASS-TRANSFER CHARACTERISTICS ;  PRESSURE-DROP ;  TAYLOR BUBBLES ;  DIRECT FLUORINATION ;  MONOLITH REACTORS ;  VOID FRACTION ;  SMALL TUBES ;  CAPILLARIES ;  CHANNELS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000259076500016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100205
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Univ Savoie, LOCIE, F-73376 Le Bourget Du Lac, France
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Yue, Jun,Luo, Lingai,Gonthier, Yves,et al. An experimental investigation of gas-liquid two-phase flow in single microchannel contactors[J]. CHEMICAL ENGINEERING SCIENCE,2008,63(16):4189-4202.
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