Experimental study on liquid-liquid two-phase flow pattern and flow characteristics in sinusoidal microchannels

被引：0
|
作者：
Zhang J. [1 ,2 ]
Zhao Y. [1 ,2 ]
Wang Y. [1 ]
Qi J. [1 ,2 ]
Lei L. [1 ]
机构：
[1] School of Energy and Power Engineering, Shandong University, Jinan
[2] Shandong Engineering Laboratory for High-efficiency Energy Conservation and Energy Storage Technology & Equipment, Shandong University, Jinan
来源：
Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 03期
关键词：
Capillary number; Flow pattern; Inlet structure; Microchannels; Two-phase flow;
D O I：
10.11949/0438-1157.20211013
中图分类号：
学科分类号：
摘要：
Experimental methods are used to analyze the flow characteristics of droplets of immiscible liquid-liquid two-phase fluid in sinusoidal microchannels with different inlet structures, including straight channel sine, wave crest sine, and the middle of the wave. Silicone oil is used as the dispersed phase, and distilled water containing 0.5% SDS is used as the continuous phase. Slug, droplet and jet flow are observed in the experiments. Effects of two-phase flow parameters and different microchannel inlet structures on the flow pattern and droplet length are analyzed. The flow pattern is greatly affected by the microchannel inlet structure, and the wave crest sinusoidal microchannel can generate the largest range of stable flow patterns than the other two channels. The droplet length increases with the increase of the volume flow rate of the dispersed phase and the ratio of the volume flow rate of the dispersed phase to that of the continuous phase, and decreases with the increase of the volume flow rate of the continuous phase and the capillary number. The inlet structure of the microchannel has influence on the length of the droplet. The length of the droplet in the sinusoidal microchannel with a straight channel inlet is the shortest, which is more conducive to the formation of droplets. Among the droplets generated by the three channels, the largest droplet size is 1.15-1.39 times larger than the smallest droplet size. The sinusoidal structure of the microchannel has almost no effect on the droplet velocity compared with the straight channel. © 2022, Editorial Board of CIESC Journal. All right reserved.
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页码：1111 / 1118
页数：7
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