Numerical treatment of the nonconservative product in a multiscale fluid model for plasmas in thermal nonequilibrium: application to solar physics

摘要: This contribution deals with the modeling of collisional multicomponent magnetized plasmas in thermal and chemical nonequilibrium aiming at simulating predicting magnetic reconnections chromosphere sun. We focus on numerical simulation a simplified fluid model order to properly investigate influence shock solutions nonconservative product present electron energy equation. Then, we derive jump conditions based travelling wave propose an original treatment avoid non-physical shocks for solution, that remains valid case coarse-resolution simulations. A key element scheme proposed is presence diffusion variables, consistent physically-sound scaling used developed by Graille et al. following multiscale Chapman-Enskog expansion method [M3AS, 19 (2009) 527--599]. The strategy eventually assessed framework solar physics test case. computational able capture both highly- coarsely-resolved cases.