Comparison of Hall MHD and the non-gyrotropic resistivity model in the global magnetohydrodynamic code BATSRUS
Abstract
We have recently added Hall MHD to the global magnetohydrodynamic code BATSRUS. Compared to ideal or resistive MHD, Hall MHD provides a more realistic modeling of the interaction of the solar wind with unmagnetized bodies and the reconnection process in magnetospheres. On the other hand accurate modeling of reconnection is rather expensive due to the required resolution and the stiffness of the Hall MHD equations. The non-gyrotropic resistivity model of Kuznetsova et al. is a phenomenological approximation based on the results of particle simulations. It provides an inexpensive but surprisingly accurate model for the reconnection process. We will systematically compare the two approaches within the BATSRUS code.
- Publication:
-
AGU Spring Meeting Abstracts
- Pub Date:
- May 2007
- Bibcode:
- 2007AGUSMSM51A..12T
- Keywords:
-
- 2723 Magnetic reconnection (7526;
- 7835);
- 7526 Magnetic reconnection (2723;
- 7835);
- 7833 Mathematical and numerical techniques (0500;
- 3200);
- 7835 Magnetic reconnection (2723;
- 7526)