三维斜脊内肋微通道结构中液液两相流场特性数值仿真  

Numerical simulation of liquid-liquid two-phase flow field characteristics in three-dimensional oblique ridge structure microchannels

作　　者：罗星皓 李家骅 郑翔 邱翔 刘宇陆 毛海舫[2] LUO Xinghao;LI Jiahua;ZHENG Xiang;QIU Xiang;LIU Yulu;MAO Haifang(College of Urban Construction and Safety Engineering,Shanghai Institute of Technology,Shanghai 201418,China;School of Chemical and Environmental Engineering,Shanghai Institute of Technology,Shanghai 201418,China;College of Science,Shanghai Institute of Technology,Shanghai 201418,China;Shanghai Institute of Applied Mathematics and Mechanics,School of Mechanics and Engineering Science,Shanghai University,Shanghai 200072,China)

机构地区：[1]上海应用技术大学城市建设与安全工程学院,上海201418 [2]上海应用技术大学化学与环境工程学院,上海201418 [3]上海应用技术大学理学院,上海201418 [4]上海大学力学与工程科学学院上海市应用数学和力学研究所,上海200072

出　　处：《化学工程》2024年第9期49-55,共7页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(91952102);国家自然科学基金资助重点项目(12032016)。

摘　　要：微通道中液液两相流型的结构对于进行液液反应、萃取、乳化等过程的微反应器装置非常重要。针对两相非混溶(甲苯-水)体系下,选取VOF(流体体积)模型对带有三维斜脊内肋结构的Y型矩形微通道中两相流场特性进行数值仿真。影响因素包括两相入口流量比和斜脊几何结构参数,结果表明:随着甲苯和水相流量比Q _(t)/Q _(w)在0.24—1.00内增加,微通道内逐渐形成均匀的段塞流型结构,并随着流体流动保持稳定状态;当流量比一致时,在斜脊数量N=3且异侧排列下,微通道内形成的分散相段塞轴向尺寸L和相邻段塞间距l整体幅值变化减小,微通道内流场状态的稳定性得到了提升。此研究对优化控制微通道化学合成制备工艺参数提供了一定指导。The study of liquid-liquid two-phase flow structure in microchannels is crucial for microreactor devices used in liquid-liquid reactions,extraction,emulsification,and other processes.Focusing on the two-phase immiscible(toluene-water)system,the VOF(volume of fluid)model was selected to numerically simulate the two-phase flow field characteristics in a Y-shaped rectangular microchannel with a three-dimensional diagonal ridge and internal rib structure.The influencing factors included the two-phase inlet flow ratio and the geometrical structure parameters of the ridges.The results indicate that as the flow ratio Q _(t)/Q _(w) increases within the range of 0.24-1.00,a uniform slug flow structure gradually forms in the microchannel and maintains a stable state with the fluid flow.Additionally,when the flow ratio is consistent,and the number of oblique ridges is N=3,arranged on different sides,the overall amplitude change of the dispersed phase slug formed in the microchannel L and the spacing between adjacent slugs l decreases.This improves the stability of the flow field state in the microchannel.The findings offer valuable insights for optimizing and controlling the process parameters of chemical synthesis and preparation of microchannels.

关 键 词：两相流 VOF 数值模拟 微通道 流动状态 优化 

分 类 号：TK124[动力工程及工程热物理—工程热物理]