INFLUENCE OF THE INITIAL ROUGHNESS OF INTERFACES ON THE INSTABILITY DEVELOPMENT AFTER SHOCK-WAVE PASSAGE

Turbulent mixing at interfaces of three-layer gas systems after shock-wave passage has been studied. The influence of the initial roughness of interfaces on the development of instability and mixing of gases of different density has been investigated. The development of Richtmyer–Meshkov instability has been simulated using the implicit large eddy method and the MIMOZA code. The results of the study have been compared with available experimental data. It has been shown that the width of the mixing region and the enstrophy and mass of mixed gases depend significantly on the degree of interface roughness.