Mixing behavior and mass transfer of liquideliquid two-phase flow in an annular microchannel with helical wires  

作　　者：Min An Chengxiang Wang Qing Liu MengyaWang Zhirong Yang Wenpeng Li Guoli Zhou Jingtao Wang Jinli Zhang 

机构地区：[1]National Supercomputing Center in Zhengzhou,Zhengzhou University,Zhengzhou 450001,China [2]School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China [3]School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

出　　处：《Chinese Journal of Chemical Engineering》2025年第1期42-56,共15页中国化学工程学报(英文版)

基　　金：the National Natural Science Foundation of China(22208320);the Science and Technology Program of Henan Province(212102210044);The Henan Association for Science and Technology Youth Talent Support Program(2022HYTP026).

摘　　要：Combining the advantages of high efficiency,low-pressure drop,and large throughput,the pore arrayenhanced tube-in-tube microchannel(PA-TMC)is a promising microreactor for industrial applications.However,most of the mass transfer takes place in the upstream pore region,while the contribution of the downstream annulus is limited.In this work,helical wires were introduced into the annulus by adhering to the outer surface of the inner tube.Mixing behavior and mass transfer of liquideliquid twophase flow in PA-TMC with different helical wires have been systematically studied by a combination of experiments and volume of fluid(VOF)method.The introduction of helical wires improves the overall volumetric mass transfer coefficient KLa by up to 133%and the mass transfer efficiency E by up to 117%.The simulation results show that the helical wire brings extra phase mixing regions and increases the specific interface area,while accelerating the fluid flow and expanding the area of enhanced turbulent dissipation rate.Influences of helical wires in various configurations are compared by the comprehensive index I concerning the pressure drop and mass transfer performance simultaneously and a new correlation between KLa and specific energy consumption f is proposed.This research deepens the understanding of the mixing behavior and mass transfer in the PA-TMCs and provides practical experience for the process intensification of microchannel reactors.

关 键 词：Microchannels Helical wires Volume of fluid(VOF) Mass transfer Optimization 

分 类 号：O35[理学—流体力学]