化学工程2026，Vol.54Issue(4)：47-53,7.DOI:10.3969/j.issn.1005-9954.2026.04.008
十字型微通道内液液两相流体动力学特性
Liquid-liquid two-phase flow fluid dynamic characteristics in cross-shaped microchannels
摘要
Abstract
The periodic geometric structure of cross-shaped microchannels can induce random flow field structures in microscale liquid-liquid two-phase flow,thus demonstrating broad application prospects in process intensification of micro-chemical systems such as micro-reaction,micro-absorption and so on.A numerical model for liquid-liquid two-phase flow in cross-shaped microchannels was established via the VOF-CSF(volume of fluid-continuum surface force)method,and further the influences of continuous phase flow rate,droplets diameter,the viscosity ratio of continuous phase to dispersed phase as well as the interfacial tension coefficient on two-phase hydrodynamic characteristics were quantitatively investigated.The results show that the periodic structures of gradually expanding-contracting in cross-shaped microchannels maintains the deformed droplets in a dynamic stretching-compression equilibrium,primarily consisting of three distinct stages regarding expansion state,intermediate state and contraction state.Based on the variation laws of droplets interface deformation coefficient with influence factors,the prediction correlations for droplets interface deformation coefficient are developed with several dimensionless numbers.Besides,large continuous phase flow rate and droplet diameter can change the vortex patterns inside the droplets.The increased interfacial tension results in a transition of the number of the internal vortex from two to six.However,the vortex structure remains insensitive to the variations in the viscosity ratio of continuous phase to dispersed phase.The obtained results can provide a scientific guidance for the rational design of liquid-liquid two-phase flow process in cross-shaped microchannels.关键词
微通道/两相流/流场结构/流体动力学Key words
microchannel/two-phase flow/flow field structure/fluid dynamics分类
化学化工引用本文复制引用
王洋,葛世雄,潘大伟..十字型微通道内液液两相流体动力学特性[J].化学工程,2026,54(4):47-53,7.基金项目
国家自然科学基金资助项目(22278274) （22278274）
过程装备与控制工程四川省高校重点实验室开放基金基础重点研究项目(GK202402) （GK202402）
