Liquid-liquid two-phase flow in a wire-embedded concentric microchannel: Flow pattern and mass transfer performance  

作　　者：Ming Chen Huiyan Jiao Jun Li Zhibin Wang Feng He Yang Jin 

机构地区：[1]Engineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources,School of Chemical Engineering,Sichuan University,Chengdu 610065,China [2]The Key Laboratory of Fine Chemical Application Technology of Luzhou,Sichuan Vocational College of Chemical Technology,Luzhou 646300,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第4期281-289,共9页中国化学工程学报（英文版）

基　　金：the National Natural Science Foundation of China (21776180, 22108177);the open project of the Key Laboratory of Fine Chemical Application Technology of Luzhou (HYJH-2102-A)。

摘　　要：In this work, flow pattern and mass transfer of liquid-liquid two-phase flow in a wire-embedded concentric microchannel are studied using toluene-water system. Droplet flow, slug flow, oval flow and annular flow are observed in the wire-embedded concentric microchannel. The effects of embedded wires and physical properties on flow patterns are investigated. The embedded wire insert is conducive to the formation of annular flow. The flow pattern distribution regions are distinguished by the Caaq(capillary number)±We_(org)(Weber number) flow pattern map. When Weorg<0.001, slug flow is the main flow pattern, and when Weorg>0.1, annular flow is the main flow pattern. Oval flow and droplet flow are between We_(org)= 0.001-0.1, and oval flow is transformed into droplet flow with the increase of Caaq. The effect of flow rate, phase ratio, initial acetic acid concentration, insert shape and flow patterns on mass transfers are studied. Mass transfer process is enhanced under annular flow conditions, the volumetric mass transfer coefficient is up to 0.36 s^(-1) because of the high interfacial area and interface renewal rate of annular flow.

关 键 词：Flow pattern Mass transfer Microchannels Two-phase flow 

分 类 号：TQ021.4[化学工程]