A 3D Smoothed Particle Hydrodynamics Study of a Non-Symmetrical Rayleigh Collapse for an Empty Cavity

ChemEngineering

Alessio Alexiadis¹  Andrea Albano¹ 

[1] School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK;

关键词: particle method;    smoothed particle hydrodynamics;    simulation;    cavitation;    shock wave;   

DOI  :  10.3390/chemengineering5030063

来源: DOAJ

【 摘 要 】

In this work the first 3D Smoothed Particle Hydrodynamics model of a Rayleigh collapse for an empty cavity is proposed with the aim of improving the hydrodynamic analysis of a non-symmetrical collapse. The hydrodynamics of the model is validated against the solution of the Rayleigh-Plesset equation for a symmetrical collapse. The model is then used to simulate a non-symmetrical collapse of an empty cavity attached to a solid surface with $\gamma =0.6$ induced by an external pressure of 50 [MPa]. The results shows that is possible to identify three regions where the hydrodynamics of the collapsing cavity shows different features. For all the stages of the collapse the simulation shows smooth pressure and velocity fields in the liquid and in the solid phase with the formation of a vortex ring in the final phase of the collapse. Finally, the model is compared to a previous 2D model to highlight strong, weak points and the key differences of both approaches in final phase of the collapse.

【 授权许可】

Unknown