Dynamics of bubble formation in single step-type microchannel

被引：0

作者：

Liu Z. ^{[1
]}

Dai S. ^{[1
]}

Duan C. ^{[1
]}

Zhang Z. ^{[1
]}

Pang Z. ^{[1
]}

Zhu C. ^{[1
]}

Fu T. ^{[1
]}

Ma Y. ^{[1
]}

机构：

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

来源：

Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 02期

关键词：

Bubble; Interfacial phenomenon; Microchannel; Microfluidics; Step-type microdevice;

D O I：

10.11949/0438-1157.20190809

中图分类号：

学科分类号：

摘要：

The bubble formation mechanism and size variation in stepped microchannels were studied by using a high-speed camera system. In the experiment, different concentrations of glycerin aqueous solution and nitrogen were used as the liquid phase and the gas phase, respectively. The mechanism of bubble formation process was explored by changing the gas-liquid flow, liquid viscosity and step width. It was observed that the bubble formation process in the step-type microfluidic chips was divided into expansion, pinch-off and energy storage stages. Increasing the gas phase, liquid phase flow rate, and decreasing the liquid phase viscosity could reduce the time consumed in each stage. The consumption time of the pinch-off stage gradually became longer as the viscosity of the liquid phase increases, making it the predominant stage in the bubble formation process. Finally, the prediction formula for the volume of bubbles was constructed based on the bubble formation mechanism in the step-type microfluidic chips. © All Right Reserved.

引用

页码：552 / 565

页数：13

共 40 条

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