An improved ten-moment closure for reconnection and instabilities
Jonathan Ng, Ammar Hakim, Liang Wang, A. Bhattacharjee
Abstract
The integration of kinetic effects in fluid models is important for global simulations of Earth's magnetosphere. The use of the two-fluid ten-moment model, which includes the pressure tensor for both species, has had some success in simulating Ganymede and Mercury with a simple closure model. We discuss a heat flux closure which accounts for some limitations of the earlier work while remaining computationally tractable. Comparisons with kinetic simulations for magnetic reconnection and lower-hybrid drift instabilities show good agreement with kinetic results and improvements on previous closure models.
Topics & Concepts
PhysicsClosure (psychology)Kinetic energyMagnetic reconnectionMagnetosphereMagnetohydrodynamicsPlasmaMechanicsMoment (physics)Classical mechanicsCauchy stress tensorHeat fluxStatistical physicsQuantum electrodynamicsNuclear physicsHeat transferEconomicsMarket economyIonosphere and magnetosphere dynamicsSolar and Space Plasma DynamicsAstro and Planetary Science