Numerical investigation of shock induced bubble collapse in water

Authors: Apazidis, N.
Document Type: Article
Pubstate: Published
Journal: Proceedings of the 21th International Shock Interaction Symposium, August 3-8, 2014, Riga, Lithuania
Year: 2014


Shock induced bubble collapse in water is investigated numerically. An accurate and robust semi-conservative volume-fraction based numerical algorithm is used to study the interaction of a plane shock in water with cylindrical and spherical air cavities. The numerical scheme is based on a system of compressible Euler equations with separate equations of state for water and gas. The interface between the two phases is described by the volume fraction function and its evolution is governed by an advection equation. The semi-conservative form of the governing equation is chosen to avoid the spurious pressure oscillations at the interface between the two fluids well-known for the conservative formulation of the problem. The present numerical scheme shows interesting details of shock propagation through water and air bubble including shock focusing process of the transmitted shock within the gas bubble as well as generation of a high speed liquid jet in the later stages of the process.