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.

我们考虑了在高环境压力条件下靠近壁的空化气泡的破坏行为。使用具有相变的完全可压缩的两相流求解器，通过数值模拟研究了具有不同间隔距离的通用配置。结果表明，相距距离对塌陷动力学，微射流形成，回弹和最大壁压力有显着影响。空化引起的材料破坏与相应的坍塌机制之间的关系是从壁处的压力影响数据获得的。我们分析了塌陷和反弹的分辨率依赖性以及观察到的最大压力分布。对六个不同网格分辨率的结果进行的比较表明，主要塌陷特征已经以最粗糙的分辨率捕获，