Slug bubble deformation and its influence on bubble breakup dynamics in microchannel  

作　　者：Yingjie Fei Chunying Zhu Taotao Fu Xiqun Gao Youguang Ma 

机构地区：[1]State Key Laboratory of Chemical Engineering,Tianjin University,Tianjin 300072,China [2]Yifang Industry Corporation,Liaoyang Petrochemical Fiber Company,Liaoyang 111003,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第10期66-74,共9页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(21978197);the aid of Opening Project of State Key Laboratory of Chemical Engineering of China(SKLCh E-21Z03)。

摘　　要：The deformation of moving slug bubbles and its influence on the bubble breakup dynamics in microchannel were studied.Three bubble morphologies were found in the experiment:slug,dumbbell and grenade shapes.The viscosity effect of continuous phase aggravates the velocity difference between the fluid near the wall and the bubble,resulting in that the continuous phase near the bubble head flows towards and squeezes the bubble tail,which causes the deformation of bubbles.Moreover,the experimental results show that the deformation of bubbles could significa ntly prolo ng the bubble breakup period at the downstream Y-junction.There exists the critical capillary number Ca_(Cr )for the asymmetric breakup of grenade bubbles,Ca_(Cr )increases with the rise of flow rate and viscosity of the continuous phase.

关 键 词：Slug bubble MICROCHANNEL Bubble deformation Bubble breakup 

分 类 号：TQ021.1[化学工程]