139Chapter 8 Dynamics of shock-accelerated V-shaped gas interface

De Gruyter eBooks, pp. 139–154

Abstract

This study investigates the dynamic evolution of a shock-accelerated V-shaped gas interface, which is composed of nitrogen and sulfur hexafluide gases hexafluide gases . The main focus is highlighted on the interplay of shock-accelerated instabilities shock-accelerated instabilities , interface deformation interface deformation , and vorticity generation. A compressible two-component Euler equation in two-dimensional is solved using a high-order modal discontinuous Galerkin method. For numerical simulations, two-distinct Mach numbers ( M s = 1.22, 1.42) are considered. The results show that the Mach numbers have a significant effect on the flow field, interface deformation, complex wave patterns, inward jet growth, and vorticity vorticity creation in the shock-accelerated V-shaped interface V-shaped interface . As the Mach number Mach number increases, the V-shaped interface deforms differently, and the distance between the triple points and the Mach stem also varies. Greater rolled-up vortex chains are produced by higher Mach values than by smaller ones. A thorough analysis of the Mach number impact identifies the factors that propel the creation of vorticity during the encounter phase. Finally, the time evolution of enstrophy and kinetic energy are investigated.

Authors 1

1. Satyvir Singh corresponding Aachen Institute for Applied and Computational Mathematics

   RWTH Aachen University

   Affiliation as printed

   Institute for Applied and Computational Mathematics, RWTH Aachen University , Germany