Numerical investigation of the liquid motion influence on the collapse of a cavitation bubble near a wall

Axially symmetric dynamics of a single cavitation bubble near a plane wall in the process of its expansion and collapse with transformation of the bubble into a toroidal one is considered. The influence of the liquid motion at the end of expansion on the following collapse is studied, depending on the initial distance between the bubble and the wall. The liquid is assumed ideal incompressible, its motion potential. The numerical technique is based on the stepping method of describing the bubble contour movement and the boundary element method. It is shown that with increasing the initial distance between the bubble and the wall, the differences in the shape of the bubble and the liquid pressure at the bubble collapse with and without allowing for the liquid motion at the beginning of collapse significantly decrease.