Features of the impact of spherical shock impulse on the boundary of gas with aqueous foam

The formation process of a spherical shock impulse in gas and its interaction with a protective aqueous foam barrier, accompanied by formation of vortex flows, are numerically investigated. The problem is solved in a two-dimensional axisymmetric formulation using a two-phase model of a gas-liquid mixture, which includes the laws of conservation of mass, momentum and energy of the mixture and an equation for the dynamics of volume content of phases.The numerical implementation is carried out on the basis of the OpenFOAM package using the standard compressibleMultiphaseInterFoam solver, modified in accordance with the conditions of the problem and model representations. The discretization of the system of equations in the chosen solver is carried out by the method of finite volumes using the computational Pimple algorithm. A significant decrease in the intensity of the shock wave in its interaction with the aqueous foam barrier is shown and the causes leading to vortex formation in the gas region are revealed. The reliability of the results obtained is estimated by comparison with solutions of a similar problem by other numerical methods.