Peer-Reviewed Journal Details
Mandatory Fields
Tripathi BB;Baskar S;Coulouvrat F;Marchiano R;
Journal Of The Acoustical Society Of America
Numerical observation of secondary Mach stem in weak acoustic shock reflection.
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Recently Ram, Geva, and Sadot [J. Fluid Mech. 768, 219-235 (2015)] showed, experimentally, the formation of a secondary Mach stem generated from the reflection of the primary Mach stem in the aerodynamic regime. Such a phenomenon has never been observed, either experimentally or numerically, in the framework of weak acoustic shocks. In this work, the formation of a secondary Mach stem is observed from the reflection of acoustic shock waves on a convex-concave boundary giving rise to a complex five-shock pattern. This study is fully numerical and is based on the numerical solution of a nonlinear acoustic system of equations using a recently developed discontinuous Galerkin solver.
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