Bubble breakup and distribution in asymmetric Y-bifurcating microchannels

被引：0
作者：
Cong, Zhenxia [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：
Breakup; Bubble; Distributions; Microchannels; Y-divergence;
D O I：
10.3969/j.issn.0438-1157.2014.01.012
中图分类号：
学科分类号：
摘要：
A high-speed camera was used to observe and record bubble breakup and distribution in bifurcating microchannels. Nitrogen and deionized water with 0.3% surfactant sodium dodecyl sulfate (SDS)-glycerol (20%, 40%, 50%) were used as dispersed and continuous phases, respectively. Three different flow patterns were observed at the divergence: asymmetric breaking with permanent obstruction, asymmetric breaking with gap and non-breaking regimes. The transition between breakup and non-breakup was studied and compared with existing reports. The effects of flow rates of both phases and physical properties of fluids on the distributions of breaking bubbles were investigated. Both breakup lengths increased with increasing flow rate of gas phase and bubble length, and decreased with increasing liquid viscosity and flow rate. As the flow rate and viscosity of liquid phase increased, the degree of asymmetrical breakup decreased. © All Rights Reserved.
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页码：93 / 99
页数：6
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