Characteristics of leakage flow in a serpentine microchannel

Chemical Industry and Engineering Progress

Characteristics of leakage flow in a serpentine microchannel

Received:2020-11-27 Revised:2021-02-26 Online:2021-03-02
Contact: Xuehu（Xue-Hu） Ma

蛇形微通道内泄漏流特性研究

梁倩卿¹,²,卜亿峰³,门卓武¹,马学虎⁴

1. 北京低碳清洁能源研究院
2. 辽宁省化工资源清洁利用重点实验室，大连理工大学
3. 北京低碳清洁能源研究所
4. 大连理工大学化工与环境生命学部化工学院化学工程研究所

通讯作者: 马学虎
基金资助:
超薄液膜的快速铺展和涟漪波动及其强化热质传递机理的研究

Abstract

Abstract: Microfluidic platforms have promising applications in gas-liquid mass transfer, heat transfer and chemical reaction, due to its great specific surface area, precise control of residence time, and stability of the transport process. The Taylor flow for six different gas-liquid systems with different surface tension and viscosity were systematically investigated in rectangular cross-section serpentine microchannels, aiming at dynamic behavior of bubbles and liquid slugs. Based on the geometric model of bubble cross-sectional shape, quantitative equation of the net leakage flow was successfully got. It is simultaneously found that the controllability of the serpentine microchannel on the leakage flow is better than that of the straight microchannel in a larger operating range. And the effects of different gas-liquid flow rates, liquid physical properties (surface tension and viscosity) and bubble length on the net leakage flow of the main channel for the serpentine microchannel were respectively analyzed in detail.

Key words: net leakage flow, gas and liquid flow, liquid physical properties, bubble length, prediction

摘要： 微流体系统通常具备极大的比表面积，易于控制等优势，在气-液相传质、传热、反应等方面具有良好的应用前景。本文考察了六个气液相体系在矩形截面蛇型微通道中的气液两相泰勒流流动情况以及气泡和液弹的动态行为，以气泡截面形状的几何模型为基础，得到了微通道中净泄漏流的量化方程。同时发现在较大的操作区间内，蛇型微通道对泄漏流的可控性优于直型微通道。并且详细分析了不同气液相流量、液相物性（表面张力和粘度）和气泡长度对蛇型微通道主通道净泄漏流的具体影响。

关键词: 净泄漏流, 气液相流量, 液相物性, 气泡长度, 预测

CLC Number:

TQ 021.4

梁倩卿卜亿峰门卓武马学虎. 蛇形微通道内泄漏流特性研究[J]. 化工进展.

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