Behavior of a shock-accelerated heavy cylindrical bubble under nonequilibrium conditions of diatomic and polyatomic gases

Abstract

The physical problem of a shock-accelerated bubble has long been a fascinating subject in the study of the Richtmyer-Meshkov (RM) instability. In the current study, the behavior of a shock-accelerated heavy cylindrical bubble under the nonequilibrium conditions of diatomic and polyatomic gases is investigated numerically in describing the RM instability. In contrast to a monatomic gas, the generation of larger rolled-up vortex chains, different kinds of outward jet formation, and large mixing zone with strong and large expansion are observed in diatomic and polyatomic gases.