||Numerical simulation on void bubble dynamics using moving particle semi-implicit method
||Wenxi Tian Yuki Ishiwatari Yoshiaki Oka
||Nuclear Engineering and Design
||In present study, the collapse of void bubble in liquid has been simulated using moving particle semiimplicit(MPS) code. The liquid is described using moving particles and the bubble–liquid interface wasset to be vacuum pressure boundary without interfacial heat mass transfer. The topological shape ofbubble can be traced according to the motion and location of interfacial particles. The time dependent
bubble diameter, interfacial velocity and bubble collapse time were obtained under wide parametric
range. The comparison with Rayleigh and Zababakhin’s prediction showed a good agreement which validates the applicability and accuracy on MPS method in solving present momentum problems. The potential void induced water hammer pressure pulse was also evaluated which is instructive for further material erosion study. The bubble collapse with non-condensable gas has been further simulated and the rebound phenomenon was successfully captured which is similar with vapor-filled cavitation phenomenon.
The present study exhibits some fundamental characteristics of void bubble hydrodynamics
and it is also expected to be instructive for further applications of MPS method to complicated bubble dynamics problems.