AN EXTENSION of the ATHENA++ CODE FRAMEWORK for GRMHD BASED on ADVANCED RIEMANN SOLVERS and STAGGERED-MESH CONSTRAINED TRANSPORT

Christopher J. White; James McLellan Stone; Charles F. Gammie

doi:10.3847/0067-0049/225/2/22

AN EXTENSION of the ATHENA++ CODE FRAMEWORK for GRMHD BASED on ADVANCED RIEMANN SOLVERS and STAGGERED-MESH CONSTRAINED TRANSPORT

Christopher J. White, James McLellan Stone, Charles F. Gammie

Research output: Contribution to journal › Article › peer-review

150 Scopus citations

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 through a number of tests. We also report on its promising performance and scalability.

Original language	English (US)
Article number	22
Journal	Astrophysical Journal, Supplement Series
Volume	225
Issue number	2
DOIs	https://doi.org/10.3847/0067-0049/225/2/22
State	Published - Aug 2016

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

accretion, accretion disks
black hole physics
magnetohydrodynamics (MHD)
relativistic processes

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10.3847/0067-0049/225/2/22

Cite this

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AB - 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 through a number of tests. We also report on its promising performance and scalability.

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KW - relativistic processes

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AN EXTENSION of the ATHENA++ CODE FRAMEWORK for GRMHD BASED on ADVANCED RIEMANN SOLVERS and STAGGERED-MESH CONSTRAINED TRANSPORT

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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