Modeling of shock wave produced by collapse of cavitation bubble using a fully conservative multiphase model

Abstract

In this study, we extensively validated the applicability of the fully conservative compressible multiphase flow model to simulate the collapse of cavitation bubbles. The mathematical model is fully conservative, which is crucial for accurately modeling the strong shock phenomena induced via bubble collapse. The numerical method accounts for compressibility and mass transfer with phase-change transitions. A high-resolution shock-capturing finite-volume method and an accurate Riemann solver were employed to capture the strong shocks produced by bubble collapse. A grid-resolution study and validation were performed to ensure the convergence and consistency of the numerical method. This study focused on analyzing the shock waves generated during the collapse as well as the dynamics of bubble collapse and rebound. Quantitative comparisons between the simulation results and experimental data as well as the reference results revealed a high level of agreement. The investigation focused on the impact of various factors, including the bubble radius, phase change, and liquid pressure, on the collapse and rebound of the cavitation bubble, as well as the resulting shock waves. These analyses yielded valuable insight into the complex behavior of cavitation bubbles that collapse in a free field.