Diffuse interface modeling of a radial vapor bubble collapse

9th International Symposium on Cavitation

Magaletti, Francesco^1 ; Marino, Luca^1 ; Casciola, Carlo Massimo^1

Dipartimento di Ingegneria Meccanica e Aerospaziale, Università di Roma la Sapienza, via Eudossiana 18, Roma

00184, Italy^1

关键词: Diffuse interface models;    Non-equilibrium phase;    Numerical experiments;    Phase Change;    Supercritical condition;    Thermal conduction;    Vapor bubble;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012028/pdf
DOI  :  10.1088/1742-6596/656/1/012028

来源: IOP

【 摘 要 】

A diffuse interface model is exploited to study in details the dynamics of a cavitation vapor bubble, by including phase change, transition to supercritical conditions, shock wave propagation and thermal conduction. The numerical experiments show that the actual dynamic is a sequence of collapses and rebounds demonstrating the importance of nonequilibrium phase changes. In particular the transition to supercritical conditions avoids the full condensation and leads to shockwave emission after the collapse and to successive bubble rebound.