Enhancement of liquid-liquid micromixing performance in curved capillary microreactor by generation of Dean vortices  

作　　者：Shaoyun Wu Zhuang Ma Zichi Yang Suying Zhao Caijin Zhou Huidong Zheng 

机构地区：[1]Fujian Engineering Research Center of Advanced Manufacturing Technology for Fine Chemicals,College of Chemical Engineering,Fuzhou University,Fuzhou 350108,China [2]Qingyuan Innovation Laboratory,Quanzhou,362114,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第4期76-82,共7页中国化学工程学报（英文版）

基　　金：supports of National Natural Science Foundation of China(22308057);Outstanding Talent Introduction Funds from Fuzhou University(0040-511175);Fuzhou University Testing Fund of precious apparatus(2023T003).

摘　　要：Micromixing efficiency is an important parameter for evaluating the multiphase mass transfer performance and reaction efficiency of microreactors.In this work,the novel curved capillary reactor with different shapes was designed to generate Dean flow,which was used to enhance the liquid-liquid micromixing performance.The Villermaux-Dushman probe reaction was employed to characterize the micromixing performance in different curved capillary microreactors.The effects of experiment parameters such as liquid flow rate,inner diameter,tube length,and curve diameter on micromixing performance were systematically investigated.Under the optimal conditions,the minimum value of the segmentation factor XS was 0.008.It was worth noting that at the low Reynolds number(Re<30),the change of curved shape on the capillary microreactor can significantly improve the micromixing performance with XS reduced by 37.5%.Further,the correlations of segment index XS with dimensionless factor such as Reynolds number or Dean number were developed,which can be used to predict the liquid-liquid micromixing performance in capillary microreactors.

关 键 词：MICROREACTOR Process intensification Micromixing performance Dean flow 

分 类 号：TQ027.1[化学工程]