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An experimental study of air-water Taylor flow and mass transfer inside square microchannels
Yue, Jun1,2; Luo, Lingai1; Gonthier, Yves1; Chen, Guangwen2; Yuan, Quan2
关键词Microchannel Taylor Flow Bubble Hydrodynamics Mass Transfer Multiphase Reactors
刊名CHEMICAL ENGINEERING SCIENCE
2009-08-15
DOI10.1016/j.ces.2009.05.026
64期:16页:3697-3708
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Technology
类目[WOS]Engineering, Chemical
研究领域[WOS]Engineering
关键词[WOS]LIQUID 2-PHASE FLOW ; BUBBLE-TRAIN FLOW ; MICROFABRICATED MULTIPHASE REACTORS ; SELECTIVE DIRECT FLUORINATION ; GAS-LIQUID ; PRESSURE-DROP ; RECTANGULAR MICROCHANNELS ; LONG BUBBLES ; POLYGONAL CAPILLARIES ; ELEMENTAL FLUORINE
英文摘要Flow and mass transfer properties under air-water Taylor flow have been investigated in two square microchannels with hydraulic diameters of 400 and 200 mu m. Experimental data on Taylor bubble velocity, pressure drop and liquid side volumetric mass transfer coefficient (k(L)a) have been presented. It was shown that the measured Taylor bubble velocity in square microchannels could be well interpreted based upon an approximate measurement of the liquid film profile therein. Then, the obtained two-phase frictional pressure drop values in both microchannels were found to be significantly higher than the predictions of the correlation proposed by Kreutzer et al. [2005b. Inertial and interfacial effects on pressure drop of Taylor flow in capillaries. A.I.Ch.E. journal 51, 2428-2440] when the liquid slug was very short, which can be explained by the inadequacy of their correlation to describe the excess pressure drop caused by the strong inner circulation in such short liquid slugs. An appropriate modification has been made to this correlation in order to improve its applicability in microchannels. Finally, the experimental (k(L)a) values in the microchannel with hydraulic diameter of 400 mu m were found to be in poor agreement with those predicted by the existing correlations proposed for capillaries with diameters of several millimeters. The observed deviation was mainly due to the fact that mass transfer experiments in this microchannel actually corresponded to the case of short film contact time and rather poor mixing between the liquid film and the liquid slug, which was not in accordance with mass transfer assumptions associated with these correlations. A new empirical correlation has been proposed to describe mass transfer data in this microchannel. (C) 2009 Elsevier Ltd. All rights reserved.
语种英语
WOS记录号WOS:000271298600015
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被引频次:77[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/321008/141441
专题中国科学院大连化学物理研究所
作者单位1.Univ Savoie, LOCIE, F-73376 Savoie Technolac, Bourget Lac, France
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
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Yue, Jun,Luo, Lingai,Gonthier, Yves,et al. An experimental study of air-water Taylor flow and mass transfer inside square microchannels[J]. CHEMICAL ENGINEERING SCIENCE,2009,64(16):3697-3708.
APA Yue, Jun,Luo, Lingai,Gonthier, Yves,Chen, Guangwen,&Yuan, Quan.(2009).An experimental study of air-water Taylor flow and mass transfer inside square microchannels.CHEMICAL ENGINEERING SCIENCE,64(16),3697-3708.
MLA Yue, Jun,et al."An experimental study of air-water Taylor flow and mass transfer inside square microchannels".CHEMICAL ENGINEERING SCIENCE 64.16(2009):3697-3708.
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