Rayleigh collapse of a bubble in a channel*

In a variety of applications, cavitation bubbles collapse under confinement (e.g., in a channel) and give rise to desired/undesired damage in certain extreme cases. The applications can range from biomedical to fractionate kidney stones to spallation neutron source where the damage limits the range of the experiments. The effect of confinement on the collapse dynamics and subsequent damage on neighboring surfaces is poorly understood. We conduct a scaling analysis of the pressures and temperatures produced from a single bubble collapsing in a channel to predict damage on the channel walls. An in-house, solution-adaptive, high-order accurate shock- and interface-capturing method is used to solve the 3D compressible Navier-Stokes equations for gas/liquid flows. The bubble's collapse morphology for different initial configurations and how it amplifies/reduces of the maximum pressures and temperatures at the channel walls will also be presented.