Numerical study on formation of a splash sheet induced by an oscillating bubble in extreme vicinity to a water surface  

作　　者：Guang-hang Wang Yan Du Zhi-jian Xiao Jian Huang Zhi-ying Wang Hong-chen Li Jing-zhu Wang Yi-wei Wang 

机构地区：[1]Key Laboratory for Mechanics in Fluid Solid Coupling Systems,Institute of Mechanics,Chinese Academy of Sciences,Beijing,100190,China [2]School of Future Technology,University of the Chinese Academy of Sciences,Beijing,100049,China [3]School of Engineering Science,University of the Chinese Academy of Sciences,Beijing,100049,China [4]Department of Biomedical Engineering,Thoraxcenter,Erasmus MC University Medical Center Rotterdam,Rotterdam,The Netherlands

出　　处：《Journal of Hydrodynamics》2022年第6期1021-1031,共11页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.12293000,12293003,12293004,12122214,12202291 and 12272382);the Youth Innovation Promotion Association CAS(Grant No.2022019).

摘　　要：When it is generated in extreme vicinity to a water surface,an oscillating bubble bursts into the atmosphere and high-pressure gas is simultaneously exhausted from it,forming a splash sheet and an open cavity.The dynamics of the splash sheet induced by the bursting of the oscillating bubble has drawn increasing attention,but it is not clearly understood.We conduct a numerical simulation in the framework of open-source software OpenFOAM.The volume of fluid and Reynolds-Averaged Navier-Stokes methods are used to precisely capture the gas-liquid interface and obtain flow structure,respectively.In addition,an experimental setup is carried out based on an object distance compensation method for validation of the numerical model.Two patterns are summarized:(1)An open splash,(2)A sealed splash depending on whether a splash sheet completely closes.Detailed numerical results shows that the bubble bursting is induced by the Rayleigh-Taylor instability.Finally,the splash closures are discussed for two patterns.

关 键 词：Cavitation bubble ventilation splash sheet flow patterns Rayleigh-Taylor instability 

分 类 号：O35[理学—流体力学]