Shock-Induced Bubble Collapse versus Rayleigh Collapse

9th International Symposium on Cavitation

Kapahi, Anil^1 ; Hsiao, Chao-Tsung^1 ; Chahine, Georges L.^1

DYNAFLOW, INC., 10621-J Iron Bridge Road, Jessup

MD, United States^1

关键词: Bubble collapse;    Bubble dynamics;    High pressure;    Material interfaces;    Multi materials;    Physical mechanism;    Re-entrant jet;    Shock induced;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012128/pdf
DOI  :  10.1088/1742-6596/656/1/012128

来源: IOP

【 摘 要 】

This paper compares two physical mechanisms for the collapse of a bubble near a rigid wall: a traveling shock-induced collapse and a Rayleigh-like collapse due to a uniform rise of the pressure around the bubble. A multi-material compressible flow solver capable of handling material interfaces under high pressures is used to investigate these two scenarios for different levels of the driving pressure ranging from 1 MPa to 400 MPa. The two mechanisms are differentiated on the basis of the resulting bubble dynamics, the reentrant jet velocity, and the pressures imparted to the wall.