Wave dynamics and vortex formation under the impact of a spherical impulse on the boundary between gas and aqueous foam

Abstract

The process of interaction of air shock-wave pulse and protective aqueous foam barrier in two-dimensional axisymmetric formulation using two-phase model of gas-liquid mixture including the laws of conservation of mass, momentum and energy for each phase is numerically investigated. The numerical implementation of the model is carried out using the twoPhaseEulerFoam solver of the OpenFOAM package. The results are presented in the form of spatial distributions of pressure fields, velocities and streamlines. The causes and dynamics of toroidal vortices formation in gas are investigated.