Statistics – Computation
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh13a1158s&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SH13A-1158
Statistics
Computation
7509 Corona, 7524 Magnetic Fields
Scientific paper
MH4D (Magnetohydrodynamics on a TETRAhedral Domain) is a numerical code to solve the resistive and viscous MHD equations on an unstructured mesh of tetrahedra. MH4D is device independent and runs on desktop computers as well as massively-parallel systems. Thanks to the use of an unstructured grid, the computational domain can be of arbitrary shape and the resolution can be increased in the regions of physical interest. Consequently, a wide range of spatial scales can be studied at the same time, for example active regions can be embedded in the large scale corona. A variational formulation of the differential operators ensures accuracy and the preservation of the analytical properties of the operators (∇ ṡ {B}=0), and self-adjointness of the resistive and viscous operators. The combined semi-implicit treatment of the waves and implicit formulation of the diffusive operators can accommodate the wide range of time scales present in the solar corona. The capability of mesh refinement and coarsening is also included. We will present a model of the solar wind obtained with the full MHD algorithm on the IBM SP3.
Lionello Roberto
Schnack Dalton D.
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