Numerical simulation of gas-liquid two-phase flow in hydrodynamically focused microchannels

doi:10.11949/j.issn.0438-1157.20150893

Abstract

Abstract:

The gas-liquid two-phase flow in the hydrodynamically focused microchannels was investigated via computational fluid dynamics (CFD) method. Film was formed in the micro-channels and the film formation process included three stages. Surface pressure, shear stress force and surface tension force were changed during the film formation process. The effects of two-phase pressure change on the two-phase flux and film thickness were investigated. The results of numerical simulation showed that the pressure changing had little influence with constant two-phase pressure ratio at 1, while changing the ratio showed the significant influence.

Key words: CFD, hydrodynamically focused, two-phase flow, microchannels

摘要：

采用计算流体力学方法,考察了水力学聚焦微通道中气、液两相的流动状态。气、液两相在微通道中呈膜状流动,成膜过程可划分为3个阶段,液相表面压力、黏性力和表面张力在该过程中不断变化。考察了两相入口压强对两相流量和膜厚的影响,模拟结果显示:保持两相压强比值不变,同时改变两相压强,影响不显著;改变两相压强比值,影响显著。

关键词: 计算流体力学, 水力学聚焦, 两相流, 微通道

CLC Number:

TQ021.1

LÜ Jianhua, LI Pin, GAO Mengfan, YIN Minghai. Numerical simulation of gas-liquid two-phase flow in hydrodynamically focused microchannels[J]. CIESC Journal, 2015, 66(9): 3398-3404.

吕建华, 李品, 高梦璠, 殷明海. 水力学聚焦微通道中气液两相流动的数值模拟[J]. 化工学报, 2015, 66(9): 3398-3404.

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