Jet Impact Stage of Bubble Collapse Near a Local Depression on a Solid Wall

The numerical technique for solving the Euler equations of compressible flow with interphase boundaries was extended to apply to problems with a non-planar solid boundary. A test problem of the high-speed water drop impact onto a solid wall with groove roughness covered by water was calculated. The results were compared with the numerical results of other authors, and good agreement was shown. The impact of a liquid jet formed during the collapse of a bubble near a bubble-sized depression on a solid wall was numerically studied. It was found that along with relatively low impact pressure, the areas with tension stresses repeatedly appear near the wall.