Lengths of bubble and slug and pressure drop in gas-liquid slug flowin microchannels

被引：0
作者：
机构：
[1] Graduate School of Science and Technology, Kumamoto Universityb, Kumamoto City, 860-8555
来源：
Kawahara, A. (akimaro@mech.kumamoto-u.ac.jp) | 1600年 / Begell House Inc.卷 / 24期
关键词：
Bubble length; Liquid slug length; Microchannel; Pressure drop; Slug flow; Two-phase flow;
D O I：
10.1615/MultScienTechn.v24.i3.40
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学科分类号：
摘要：
The characteristics of two-phase slug flow, i.e., bubble length and liquid slug length and pressure drop in horizontal circular and rectangular microchannels with T-junction-type gas-liquid mixer have been investigated. The inner diameter of the circular channel was 250 m, and the hydraulic diameter of the rectangular one was 235 m. In order to determine the effects of fluid properties, distilled water and aqueous solutions of ethanol having different mass concentrations of 49 and 100 wt% and HFE7200 were used as the test liquid, while nitrogen gas was used as the test gas. The bubble length data for circular and rectangular microchannels were well correlated with Sobieszuk et al.s [Chem. Eng. Res. Des., vol. 88, pp. 263-269, 2010] correlation. The ratio of the bubble length to bubble pitch, which is sum of the bubble length and the liquid slug length, could be correlated with the homogeneous void fraction, regardless of the channel geometries and the liquid properties. The two-phase pressure drop could be reasonably calculated with a unit cell model, except for flows with relatively larger capillary and Weber numbers. © 2012 by Begell House, Inc.
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页码：239 / 256
页数：17
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