Effect of bubble burst on SiC particles in gas liquid solid three phase turbulent environment
HUANG Dou dou, JI Shi ming, CHEN Guo da, GE Jiang qin, ZHANG Li
(Key Laboratory of E&M, Ministry of Education & Zhejiang Province, Zhejiang University of 
Technology, Hangzhou 310014, China)

Abstract: In order to solve the problem of controllability of bubble rupture to SiC particles in gas liquid solid three phase abrasive flow polishing process, the influence of micro nano bubble burst in near wall on the flow field and particles in the gas liquid solid three phase flow was studied. The bubble and particles dynamics model of gas liquid solid three phase abrasive flow was established by multiphase fluid volume (VOF) model and k ε turbulence model in the Fluent software, and the effect law of bubble on the wall and particles was obtained. The surface kinetic energy of the workpiece was improved by the disturbance of the high velocity jet caused by the bubble burst in the flow field. The results show that the smaller the initial diameter of the bubble or the smaller the distance between the bubble and the particle, the greater the effect of the local jet caused by the bubble burst on the surrounding particles. The study can provide reference for the research of fluid precision machining, cavitation erosion and bubble controllability.

Key words: gas liquid solid three phase flow; micro nano bubble; jet; particle movement