文献类型：期刊文献

英文题名：Numerical simulation of wake structure and particle entrainment behavior during a single bubble ascent in liquid-solid system

作者：Zhang, Wei[1];Chen, Xueli[1];Pan, Weitong[1];Xu, Jianliang[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, POB 272, Shanghai 200237, Peoples R China

年份：2022

卷号：253

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20221111788483);WOS:【SCI-EXPANDED(收录号:WOS:000912203600003)】；

基金：The authors thank the National Key Research and Development Program of China [2017YFB0602601] for supporting this study.

语种：英文

外文关键词：Particle entrainment; Wake structure; Three phase hydrodynamics; VOF-DPM

摘要：The wake structure and particle entrainment behavior during a single bubble ascent in a liquid-solid system were investigated through numerical simulations. A combined volume-of-fluid and discrete phase model method was used for the numerical simulation. Three-phase hydrodynamics are systematically investigated and discussed. The results showed that the bubble wake with entrained particles comprised a stable bubble wake region, fluctuating bubble wake region, and vortex tail region. Vortex shedding with the bubble oscillation caused particles in the fluctuating wake region to be de-entrained. Analysis of the wake regions and particle distribution revealed the stable bubble wake region as the key for entrainment. For the selected micron particles (d(p) = 1-100 lm), most of entrained particles were enriched in the stable bubble wake region, and the enrichment effect was gradually significant with the increase in bubble size. Compared with bubble sizes, particle properties such as density and diameter had a weaker effect on entrainment. (C) 2022 Elsevier Ltd. All rights reserved.