A simple, yet robust, 3D resistive MHD code for simulations of laboratory and astrophysical plasmas

Details A simple, yet robust, 3D resistive MHD code for simulations of laboratory and astrophysical plasmas A simple, yet robust, 3D resistive MHD code for simulations of laboratory and astrophysical plasmas

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..mar.f3003c&link_type=abstract

American Physical Society, Annual APS March Meeting, March 18 - 22, 2002 Indiana Convention Center; Indianapolis, Indiana Meetin

Physics

Scientific paper

Details are presented of the 3D resistive MHD code Gorgon. The code performs explicit hydrodynamics on a regular, Cartesian, Eulerian grid. Both the thermal and the magnetic field diffusion equations are backwards differenced and solved implicitly by iterative matrix solution. In the magnetic case, all three components of the field are diffused simultaneously, which results in a 3n x 3n matrix with 29 non-zero diagonals. The divergence of B is intrinsically conserved by the finite difference schemes used in both the diffusion and advection routines. Additional modules which simulate the effects of multiple temperatures, LTE ionisation, different equations of state, and radiation loss are described. Data is presented from separate 3D benchmark tests of the thermal and magnetic field diffusion routines and from 3D MHD instability benchmark tests of the entire code. Different variants of this code have used extensively in the study of wire array Z-pinches for inertial confinement fusion, to model the generation of hypersonic, radiatively cooled, laboratory plasma jets and for the study of magnetically collimated jets from Active Galactic Nuclei. Results from each research topic will be presented.

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