Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008a%26a...486..655s&link_type=abstract
Astronomy and Astrophysics, Volume 486, Issue 2, 2008, pp.655-662
Astronomy and Astrophysics
Astrophysics
19
Methods: Numerical, Magnetohydrodynamcs (Mhd), Plasmas, Sun: General
Scientific paper
Aims: We describe a newly-developed magnetohydrodynamic (MHD) code with the capacity to simulate the interaction of any arbitrary perturbation (i.e., not necessarily limited to the linearised limit) with a magnetohydrostatic equilibrium background. Methods: By rearranging the terms in the system of MHD equations and explicitly taking into account the magnetohydrostatic equilibrium condition, we define the equations governing the perturbations that describe the deviations from the background state of plasma for the density, internal energy and magnetic field. We found it was advantageous to use this modified form of the MHD equations for numerical simulations of physical processes taking place in a stable gravitationally-stratified plasma. The governing equations are implemented in a novel way in the code. Sub-grid diffusion and resistivity are applied to ensure numerical stability of the computed solution of the MHD equations. We apply a fourth-order central difference scheme to calculate the spatial derivatives, and implement an arbitrary Runge-Kutta scheme to advance the solution in time. Results: We have built the proposed method, suitable for strongly-stratified magnetised plasma, on the base of the well-documented Versatile Advection Code (VAC) and performed a number of one- and multi-dimensional hydrodynamic and MHD tests to demonstrate the feasibility and robustness of the code for applications to astrophysical plasmas.
Erdelyi Robert
Fedun Viktor
Shelyag Sergiy
No associations
LandOfFree
Magnetohydrodynamic code for gravitationally-stratified media does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Magnetohydrodynamic code for gravitationally-stratified media, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetohydrodynamic code for gravitationally-stratified media will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1169685