Shock structure solutions of Grad 13-moment equations for binary gas mixtures

The presence of sub-shocks within a shock structure solution is discussed for an inert binary mixture of monatomic gases, whose evolution is governed by a Grad 13-moment model. The aim of this paper is to analyse the role of characteristic speeds on the occurrence of jump discontinuities along the wave front. Lax admissible sub-shocks are further examined by geometric arguments on singularity manifolds. Theoretical results are confirmed by numerical simulations in the case of Helium and Argon mixtures. (c) 2022 Elsevier B.V. All rights reserved.