文献类型：会议

作　　者：王磊 陶益壮

作者单位：西安交通大学航天航空学院国际应用力学中心

会议文献：第十一届全国流体力学学术会议论文摘要集

会议名称：第十一届全国流体力学学术会议

会议日期：20201203

会议地点：中国广东深圳

出版日期：20201200

学会名称：中国力学学会

语　　种：中文

摘　　要：The impact of air-in-liquid compound drops is important for industrial applications such as the deposition of thermal barrier coatings or the design of polymer foams.Zhu et al.(2020) investigated experimentally the dynamics of a drop containing a bubble impacting onto a pool of the same liquid 3).They observed that the bubble can either be engulfed into the pool or burst before or during the impact.In experiments,it is difficult to control the size and position of the bubble.In order to have a better control of the impact conditions,we propose here to use numerical simulations to investigate this problem.We focus on the bubble deformations with the vortex ring dynamics when it goes into the pool,which is observed at lower impact velocities.The aim of our study is to investigate the effect of the bubble diameter Db and the impact velocity V on the deformations of the bubble during impact,and the relationship with the vortex ring.This study uses the open source code Basilisk(http://basilisk.fr),based on the volume of fluid(VOF) method.We quantify the deformations of the bubble by measuring the horizontal extension of the bubble during impact,and its maximum spreading diameter.We observed that the size of the bubble plays an important role on its dynamics,and it also affects the trajectory of the vortex ring.

关 键 词：BUBBLE Vortex ring  Basilisk  VOF

分 类 号：O35]