Low-cost modelling for bubble collapse displacement

A gas or vapor bubble collapsing in the vicinity of a rigid boundary displaces towards the boundary and produces a high-speed jet directed at the boundary. We present a low-cost model that can be used to predict the direction and distance of bubble displacement in complex geometries. This model uses the Boundary Element method to predict the geometric 'anisotropy' experienced by the bubble. We experimentally explore a robust measure of bubble displacement, showing that the bubble displacement in a series of different complex geometries behaves as a single function of the predicted anisotropy parameter values.