Effect of stand-off distance and spatial resolution on the pressure impact of near-wall vapor bubble collapses

Theresa Trummler, Steffen J. Schmidt, Nikolaus A. Adams

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

We consider the collapse behavior of cavitation bubbles near walls under high ambient pressure conditions. Generic configurations with different stand-off distances are investigated by numerical simulation using a fully compressible two-phase flow solver including phase change. The results show that the stand-off distance has significant effects on collapse dynamics, micro-jet formation, rebound, and maximum wall pressure. A relation between cavitation induced material damage and corresponding collapse mechanisms is obtained from pressure-impact data at the wall. We analyze the resolution dependence of collapse and rebound and the observed maximum pressure distributions. The comparison of the results on six different grid resolutions shows that main collapse features are already captured on the coarsest resolution, while the peak pressures are strongly resolution dependent.

Original languageEnglish
Article number103618
JournalInternational Journal of Multiphase Flow
Volume141
DOIs
StatePublished - Aug 2021

Keywords

  • Aspherical collapse
  • Bubble dynamics
  • Cavitation
  • Erosion potential
  • Grid study

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