Numerical simulation of cavitation-bubble expansion and collapse inside a bottle subjected to impact on its topside

Abstract

In this study, we simulate the acceleration-induced cavity bubble expansion and its non-spherical collapse in a drastically varying pressure field caused by mechanical impact, and we qualitatively compare the results with those for similar ζ number (Obreschkow et al., ) as recorded by a high-speed camera (Taylor, ). The gas–liquid interface is tracked by using the volume of fluid method. The nonlinear compressibility effect of the liquid phase is considered by applying the Tait equation. The simulation of the impact load is accomplished by converting the acceleration curve obtained from the experiment (Kang & Raphael, ) into the velocity curve of the bottom boundary movement through integration and subsequent using of dynamic mesh model. Numerical results show that cavitation bubble nucleuse expand rapidly in the drastically decreasing pressure field caused by the impact and a pressure wave is emitted and propagates in the liquid during the subsequent collapse of the bubble. When the pressure wave is reflected on the wall, it causes a high peak pressure at the wall surface, which may underlie the rupture of the bottle wall in the experiment (Daily & Pendlebury, ).

Keywords

• high acceleration
• cavitation
• impact load
• dynamic mesh
• bubble collapse
• pressure wave