T型微通道内非牛顿微液滴生成过程研究  

Formation process simulation of microdroplets of non-Newtonian fluid in T-junction microchannels

作　　者：韩国鑫 邢雷[1,2] 蒋明虎 刘彩玉[1] HAN Guo-xin;XING Lei;JIANG Ming-hu;LIU Cai-yu(School of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang Province,China;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention,Daqing 163318,Heilongjiang Province,China)

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318 [2]黑龙江省石油石化多相介质处理及污染防治重点实验室,黑龙江大庆163318

出　　处：《化学工程》2023年第4期56-61,共6页Chemical Engineering(China)

基　　金：国家自然科学基金区域创新发展联合基金重点支持项目(U21A20104);黑龙江省自然科学基金资助项目(LH2022E017);提高油气采收率教育部重点实验室开放课题(NEPU-EOR-2021-004);大庆市指导性科技计划项目(Z01-2021-38)。

摘　　要：为了研究T型微通道内非牛顿流体微液滴生成过程,文中采用流体体积模型对该过程进行了数值模拟,并开展高速显微实验对数值模拟结果进行准确性验证。结果表明:T型微通道内非牛顿流体液滴生成存在挤压和剪切2种机制;离散相流量不变,随着连续相毛细数的增大,不同质量浓度的聚合物水溶液离散液滴的相对长度均呈减小趋势;液滴的相对长度随聚合物质量浓度变化呈现出非单调性,初始阶段随着聚合物质量浓度从0增加到150 mg/L,液滴相对长度逐渐减小,当质量浓度提高至150—300 mg/L时,液滴相对长度逐渐增加。研究结果可为非牛顿流体微液滴制备技术的发展提供参考。The fluid volume model was used to simulate the formation process of non-Newtonian fluid droplets in T-shaped microchannels.High-speed microscopic experiments were carried out to verify the accuracy of the numerical simulation results.The results denote that there are two mechanisms of squeezing and shearing for the formation of non-Newtonian fluid droplets in T-shaped microchannels.The inlet flow rate of discrete phase is constant,and with the increase of capillary number of continuous phase,the relative length of discrete droplets of polymer aqueous solution with different mass concentration tends to decrease.With the increase of polymer mass concentration from 0 to 150 mg/L,the relative length of droplets decreases gradually,when the mass concentration increases from 150 to 300 mg/L,the relative length of droplets increases gradually.The results can provide a reference for the development of the formation technology of non-Newtonian fluid droplets.

关 键 词：微液滴 T型微通道 毛细数 非牛顿流体 

分 类 号：O359.2[理学—流体力学]