Ideality analysis and general laws of bubble swarm microflow for large-scale gas-liquid microreaction processes  

作　　者：Lin Sheng Yuchao Chen Jian Deng Guangsheng Luo 

机构地区：[1]The State Key Laboratory of Chemical Engineering,Department of Chemical Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第10期56-65,共10页中国化学工程学报（英文版）

基　　金：financial support from National Natural Science Foundation of China(21991104)。

摘　　要：The flow ideality of bubbly microflow remains unclear even though it is vital for the design of microreactors,especially the ideality of bubble swarm microflow for large-scale gas-liquid microreaction processes.This work is the first time to report the ideality analysis of the microbubble swarm in a relatively large microchannel.The bubble swarm microflow has undergone two conditions:quasihomogeneous plug flow and liquid phase/gas-liquid qua si-homogeneous phase two-phase laminar flow.Both the deviations of void fraction and bubble velocity from the ideal plug flow can divide into two parts,and the two transition points simultaneously happen at the velocity ratio of 1.25.There exists a critical capillary number to maintain the quasi-homogeneous plug flow,which could be regarded as the general laws for the design of gas-liquid microreactors.Finally,a novel model is developed to predict the bubble velocity.This work could be very helpful for the large-scale gas-liquid microreactors design.

关 键 词：Bubble swarm Flow ideality Viscous fluids Gas-liquid microreactor 

分 类 号：TQ021.1[化学工程]