Progress in development of HEDP capabilities in FLASH's Unsplit Staggered Mesh MHD solver

Details Progress in development of HEDP capabilities in FLASH's Unsplit Staggered Mesh MHD solver Progress in development of HEDP capabilities in FLASH's Unsplit Staggered Mesh MHD solver

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ap%26ss.336..157l&link_type=abstract

Astrophysics and Space Science, Volume 336, Issue 1, pp.157-162

Physics

High-Energy-Density Physics, Radiation-Hydrodynamics, Flash, Usm-Mhd, Jfnk Implicit Solver, Heat Conduction, Biermann Battery Effects

Scientific paper

FLASH is a publicly available astrophysical community code designed to solve highly compressible multi-physics reactive flows. We are adding capabilities to FLASH that will make it an open science code for the academic HEDP community. Among many important numerical requirements, we consider the following features to be important components necessary to meet our goals for FLASH as an HEDP open toolset. First, we are developing computationally efficient time-stepping integration methods that overcome the stiffness that arises in the equations describing a physical problem when there are disparate time scales. To this end, we are adding two different time-stepping schemes to FLASH that relax the time step limit when diffusive effects are present: an explicit super-time-stepping algorithm (Alexiades et al. in Com. Num. Mech. Eng. 12:31-42, 1996) and a Jacobian-Free Newton-Krylov implicit formulation. These two methods will be integrated into a robust, efficient, and high-order accurate Unsplit Staggered Mesh MHD (USM) solver (Lee and Deane in J. Comput. Phys. 227, 2009). Second, we have implemented an anisotropic Spitzer-Braginskii conductivity model to treat thermal heat conduction along magnetic field lines. Finally, we are implementing the Biermann Battery term to account for spontaneous generation of magnetic fields in the presence of non-parallel temperature and density gradients.

Affiliated with

Also associated with

No associations

Rating

Progress in development of HEDP capabilities in FLASH's Unsplit Staggered Mesh MHD solver 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 Progress in development of HEDP capabilities in FLASH's Unsplit Staggered Mesh MHD solver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Progress in development of HEDP capabilities in FLASH's Unsplit Staggered Mesh MHD solver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-980323