Current density (gray scale) and magnetic field lines (white) at late stages of a resistive MHD simulation (top) and a PIC simulation (bottom) of the Newton challenge problem; modified after Birn et al. 7
Mass (top), entropy (center), and pressure (bottom) as functions of the magnetic flux variable for the configurations shown in Fig. 1. Also shown are the parallel and perpendicular pressure components for the PIC simulation.
(Color online) Joule dissipation (color scale), , in the resistive MHD simulation (top) and the PIC simulation (bottom) at the times of fastest reconnection, showing the strong localization.
Entropy as function of the flux variable at various times for a MHD simulation with uniform resistivity. The more widely spread dissipation leads to a more noticeable increase in entropy.
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