Gas-liquid flow distribution of parallel microchannels

被引：0

作者：

Bai, Lu ^{[1
]}

Zhu, Chunying ^{[1
]}

Fu, Taotao ^{[1
]}

Ma, Youguang ^{[1
]}

机构：

[1] State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University

来源：

Huagong Xuebao/CIESC Journal | 2014年 / 65卷 / 01期

关键词：

Bubble; Flow pattern; Gas-liquid distribution; Gas-liquid flow; Microchannels; Uniformity;

D O I：

10.3969/j.issn.0438-1157.2014.01.014

中图分类号：

学科分类号：

摘要：

The scale-up of microstructured reactor is an essential issue in order to achieve required throughput for industrial application. A high speed camera was used to observe gas-liquid flow pattern and phase distribution in four parallel microchannels. The influence of flow rate and viscosity on flow uniformity was investigated. The experimental liquid phase was deionized water with 0.3%(mass) surfactant sodium dodecyl sulfate (SDS)-glycerol, and the gas phase was nitrogen (N2). Six types of two-phase flow patterns were observed in the parallel microchannels. For the situation of all slug flow in four branch channels, the distribution of bubble length and velocity was studied. At a given gas flow rate, the relative standard deviation (RSD) of bubble length in branch channels increased with increasing liquid flow rate, and the RSD of bubble velocity in branch channels increased with increasing liquid flow rate up to a maximum and then gradually decreased. Non-uniformity of gas phase distribution increased with the increase of liquid flow rate and viscosity, and non-uniformity of liquid phase distribution decreased with the increase of liquid viscosity. The influence of gas flow rate on two-phase distribution was not significant. The study is helpful for the design and optimization of parallel microchannel structure to realize the uniform two-phase distribution. © All Rights Reserved.

引用

页码：108 / 115

页数：7

共 18 条

[1]

Fu T.T., Ma Y.G., Funfschilling D., Zhu C., Li H.Z., Breakup dynamics of slender bubbles in non-newtonian fluids in microfluidic flow-focusing devices, AIChE Journal, 58, 11, pp. 3560-3567, (2012)

[2]

Wang X., Yong Y.M., Fan P., Yu G.Z., Yang C., Mao Z.S., Flow regime transition for cocurrent gas-liquid flow in micro-channels, Chemical Engineering Science, 69, 1, pp. 578-586, (2012)

[3]

Kashid M.N., Renken A., Kiwi-Minsker L., Gas-liquid and liquid-liquid mass transfer in microstructured reactors, Chemical Engineering Science, 66, 17, pp. 3876-3897, (2011)

[4]

Shui L.L., Eijkel J.C.T., van den Berg A., Multiphase flow in microfluidic systems-control and applications of droplets and interfaces, Advances in Colloid and Interface Science, 133, 1, pp. 35-49, (2007)

[5]

Al-Rawashdeh M., Nijhuis X., Rebrov E.V., Hessel V., Schouten J.C., Design methodology for barrier-based two phase flow distributor, AIChE Journal, 58, 11, pp. 3482-3493, (2012)

[6]

Al-Rawashdeh M., Fluitsma L.J.M., Nijhuis T.A., Rebrov E.V., Hessel V., Schouten J.C., Design criteria for a barrier-based gas-liquid flow distributor for parallel microchannels, Chemical Engineering Journal, 181-182, 1, pp. 549-556, (2012)

[7]

Chen J.F., Wang S.F., Cheng S., Experimental investigation of two-phase distribution in parallel micro-T channels under adiabatic condition, Chemical Engineering Science, 84, 24, pp. 706-717, (2012)

[8]

Hansson J., Karlsson M.J., Haraldsson T., Brismar H., van der Wijingaart W., Russom A., Inertial microfluidics in parallel channels for high-throughput applications, Lab on a Chip, 12, 22, pp. 4644-4650, (2012)

[9]

Moritani T., Yamada M., Seki M., Generation of uniform-size droplets by multistep hydrodynamic droplet division in microfluidic circuits, Microfluidics and Nanofluidics, 11, 5, pp. 601-610, (2011)

[10]

Yue J., Boichot R., Luo L.H., Gonthier Y., Chen G.W., Yuan Q., Flow distribution and mass transfer in a parallel microchannel contactor integrated with constructal distributors, AIChE Journal, 56, 2, pp. 298-317, (2009)

← 1 2 →