The Importance of Heat Conduction and Viscosity in Solar Corona and Comparison of Magnetohydrodynamic Equations of One-Fluid and Two-Fluid Structure in Current Sheet

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Magnetic reconnection (MR) plays an important role in solar flares, coronal heating and geomagnetic substorms. A number of magnetohydrodynamic (MHD) discontinuities can be produced by MR. Previous studies showed that the heat conductivity parallel to the magnetic field was much larger than the perpendicular conductivity. On the other hand recent SOHO observations have shown that perpendicular heat conductivity plays an important role in an MR region. In this paper numerical simulations that take into account the effects of both parallel and perpendicular heat conductivities are presented. When the viscosity parameter was added, real shock formation under jump conditions was not observed. While temperature is increasing smoothly, a cut-off shape in initial and final limits of the shock wave was calculated for density and pressure. In this paper a comprehensive simulation of the one-fluid structure is presented. Extension of this work to simulations of two-fluid structure is proposed.

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