An Extension of the Athena++ Code Framework for GRMHD Based on Advanced Riemann Solvers and Staggered-Mesh Constrained Transport
Abstract
We present a new general relativistic magnetohydrodynamics (GRMHD) code integrated into the Athena++ framework. Improving upon the techniques used in most GRMHD codes, ours allows the use of advanced, less diffusive Riemann solvers, in particular HLLC and HLLD. We also employ a staggered-mesh constrained transport algorithm suited for curvilinear coordinate systems in order to maintain the divergence-free constraint of the magnetic field. Our code is designed to work with arbitrary stationary spacetimes in one, two, or three dimensions, and we demonstrate its reliability in a number of tests. We also report on its promising performance and scalability.
Keywords
Cite
@article{arxiv.1511.00943,
title = {An Extension of the Athena++ Code Framework for GRMHD Based on Advanced Riemann Solvers and Staggered-Mesh Constrained Transport},
author = {Christopher J. White and James M. Stone and Charles F. Gammie},
journal= {arXiv preprint arXiv:1511.00943},
year = {2016}
}
Comments
30 pages, 17 figures, 1 table; this version accepted to ApJS; changes from previous version include additional tests and more thorough literature comparisons