Numerical study of shock waves and supersonic jets triggered by cavitation bubble collapse in different pressurized ambiences

This paper presents a numerical exploration of shock waves and high-speed microjets induced by the collapse of bubbles near a wall in a pressurized liquid using a recently developed compressible multiphase flow model. The mathematical model utilized in this study ensures full conservation, which is a critical factor for faithfully representing shock phenomena. The numerical methodology integrates the principles of compressibility and thermodynamics to accurately simulate the intricate flow behavior. A shock-capturing method is employed along with a precise Riemann solver and a high-order scheme to capture intense shocks effectively. This investigation examines the propagation of pressure waves, shock structures, and highspeed liquid jets generated by bubble collapses near a wall under various pressurized ambient conditions. This study aims to provide a comprehensive understanding of the bubble collapse phenomena in high-pressure environments, thereby elucidating the associated physical aspects.