Multicomponent fluid model for two-temperature plasmas derived from kinetic theory : application to magnetic reconnection

摘要: This contribution deals with the fluid modeling of multicomponent magnetized plasmas in thermo-chemical non-equilibrium from partially- to fully-ionized collisional regimes, aiming at predictive simulation magnetic reconnection Sun chromosphere conditions. Such models are required for large-scale simulations by relying on high performance computing. The model is derived a kinetic theory approach, yielding rigorous description dissipative and effects well-identified mathematical structure. We start general system equations that obtained means multiscale Chapman-Enskog method, based non-dimensional analysis accounting mass disparity between electrons heavy particles, including influence electromagnetic field transport properties. latter computed using spectral Galerkin method converged Laguerre-Sonine polynomial approximation. Then, limit small Debye length respect characteristic scale chromosphere, we derive two-temperature single-momentum diffusion coupled Maxwell's equations, which able describe fully- partially-ionized plasmas, beyond multi-fluid Braginskii, valid whole range second development verification an accurate robust numerical strategy CanoP, massively parallel code adaptive mesh refinement capability, cope full spectrum scales process, without additional constraint time steps compared single-fluid Magnetohydrodynamics (MHD) models. final study physics collaboration heliophysics team NASA Ames Research Center. show methods allow us retrieve results usual MHD highly case equilibrium, while achieving more detailed relevant such applications weakly case, where become important.