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An experimental investigation of gas-liquid two-phase flow in single microchannel contactors
Yue, Jun1,2; Luo, Lingai1; Gonthier, Yves1; Chen, Guangwen2; Yuan, Quan2; Lingai Luo; Yuan Q(袁权); Lingai Luo; Yuan Q(袁权)
关键词Microchannel Multiphase Now Flow Pattern Taylor Flow Pressure Drop
刊名CHEMICAL ENGINEERING SCIENCE
2008-08-16
ISSN0009-2509
DOI10.1016/j.ces.2008.05.032
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
关键词[WOS]MICROFABRICATED MULTIPHASE REACTORS ; MASS-TRANSFER CHARACTERISTICS ; PRESSURE-DROP ; TAYLOR BUBBLES ; DIRECT FLUORINATION ; MONOLITH REACTORS ; VOID FRACTION ; SMALL TUBES ; CAPILLARIES ; CHANNELS
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.
语种英语
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WOS记录号WOS:000259076500016
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/100205
专题中国科学院大连化学物理研究所
通讯作者Lingai Luo; Yuan Q(袁权); Lingai Luo; Yuan Q(袁权)
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
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GB/T 7714
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.
APA Yue, Jun.,Luo, Lingai.,Gonthier, Yves.,Chen, Guangwen.,Yuan, Quan.,...&袁权.(2008).An experimental investigation of gas-liquid two-phase flow in single microchannel contactors.CHEMICAL ENGINEERING SCIENCE,63(16),4189-4202.
MLA Yue, Jun,et al."An experimental investigation of gas-liquid two-phase flow in single microchannel contactors".CHEMICAL ENGINEERING SCIENCE 63.16(2008):4189-4202.
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