T型微通道内液-液两相流流型研究  

Study on Liquid-Liquid Two-Phase Flow Patterns in a T-Shaped Microchannel

作　　者：王晓军[1] 张林[1] 吴苏晨[2] 张程宾[2] 刘向东[2] WANG Xiao-jun;ZHANG Lin;WU Su-chen;ZHANG Cheng-bin;LIU Xiang-dong(Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University,Nanjing 210096, China)

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]东南大学能源热转换及其过程测控教育部重点实验室,江苏南京210096

出　　处：《高校化学工程学报》2017年第1期13-20,共8页Journal of Chemical Engineering of Chinese Universities

基　　金：中国工程物理研究院科学技术发展基金(2013A0302016;2013B0302051;2015B0302071)

摘　　要：论文建立了T型微通道内液-液两相流动理论模型并采用格子Boltzmann方法进行了数值模拟,研究了T型微通道内液-液两相流型形成机制及其影响因素。采用已有文献中的实验数据验证了模型的合理性。研究结果表明,T型微通道液-液两相流流型主要由两相入口流量比和离散相We数决定,通过调整入口流量比和离散相We数,可获得弹状流、离散液滴、平行流等经典流型。离散相的相对长度受连续相毛细数Ca影响明显。当连续相毛细数较大,离散相形成液滴,离散相相对长度随连续相毛细数Ca呈单调减少趋势。A theoretical model of liquid-liquid two-phase flow in a T-shaped microchannel was developed and numerically analyzed by Lattice Boltzmann method to investigate liquid-liquid two-phase flow regimes and affecting factors. The theoretical model was verified using experimental data available in literature. The results indicate that the flow patterns of liquid-liquid flow are dependent on the flow rate ratio of the two inlets and Weber number of the dispersed phase in a T-shaped microchannel. Three typical flow patterns in a T-shaped microchannel including droplet flow, jet flow and parallel flow are obtained by varying flow rate ratio and Weber number of the dispersed phase. The relative length of the dispersed phase is obviously affected by the capillary number of the continuous phase. When the capillary number of the continuous phase is relatively large,the dispersed phase forms droplets, and the relative length of dispersed phase decreases monotonously with the increase of the capillary number of the continuous phase.

关 键 词：格子BOLTZMANN方法 微通道 两相流动 数值模拟 

分 类 号：O363.1[理学—流体力学]