Flow and mass transfer characteristics of Newtonian/non-Newtonian liquid-liquid flow in a microreactor

被引：0
|
作者：
Zhang, Dewang [1 ,2 ]
Zhao, Qiankun [1 ]
Guo, Xiaoni [1 ]
Yao, Chaoqun [1 ]
Chen, Guangwen [1 ]
机构：
[1] Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Liaoning, Dalian
[2] School of Chemistry and Chemical Engineering, China University of Petroleum, Shandong, Qingdao
来源：
Huagong Xuebao/CIESC Journal | 2024年 / 75卷 / 11期
关键词：
mass transfer; microfluidics; multiphase flow; non-Newtonian fluid; process intensification;
D O I：
10.11949/0438-1157.20240569
中图分类号：
学科分类号：
摘要：
The online mass transfer characterization technology was used to study the liquid-liquid two-phase mass transfer process of Newtonian/non-Newtonian fluid with polyacrylamide (PAAm) solution as the dispersed phase in the microchannel. The flow patterns were analyzed first. A unique sussage slug flow was observed and the effects of PAAm concentration on the flow patterns (slug flow, sussage slug flow and annular flow) were investigated. The research reveals that the mass transfer in both the Newtonian and non-Newtonian slug droplets was dominated by the convection and diffusion. However, the shear-thinning characteristics of the non-Newtonian fluid lead to significant change in the vortices and concentration distribution. The convection inside the slug droplets was affected by the flow rate, droplet length and capillary number. Based on the penetration theory, a modified correlation by relating the flow rate ratio and capillary number was proposed, which shows excellent prediction performance. © 2024 Materials China. All rights reserved.
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页码：4162 / 4169
页数：7
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