Multiple-relaxation-time discrete Boltzmann modeling of multicomponent mixture with nonequilibrium effects

A multiple-relaxation-time discrete Boltzmann model (DBM) is proposed for multicomponent mixtures, where compressible, hydrodynamic, and thermodynamic nonequilibrium effects are taken into account. It allows the specific heat ratio Prandtl number to be adjustable, suitable both low high speed fluid flows. From physical side, besides being consistent with Navier-Stokes equations, Fick's law Stefan-Maxwell diffusion equation in hydrodynamic limit, DBM provides more kinetic information about effects. The capability of describe flows, beyond representation, enables study entropy production mechanism complex especially mixtures. Moreover, current employed investigate behaviors compressible Kelvin-Helmholtz instability (KHI). found that, dynamic KHI process, mixing degree flow similar cases various thermal conductivity initial temperature configurations. Physically, conduction exert slight influences on formation evolution KHI.