Mathematical modeling of turbulent mixing in gas systems with a chevron contact boundary using NUT3D, BIC3D, EGAK, and MIMOSA numerical codes

The paper presents computational and experimental studies of the evolution of turbulent mixing in three-layer gas systems with the development of hydrodynamic instabilities, in particular Richtmyer-Meshkov and Kelvin-Helmholtz, under the action of shock waves. One of the contact boundaries of the gases was flat, the other with a break in the form of a chevron. Numerical calculations are performed both without initial perturbations of the contact boundaries, and in the presence of perturbations. It is shown that the roughness of the contact boundary significantly affects the width of the mixing zone.