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Title: Fornax: A Flexible Code for Multiphysics Astrophysical Simulations

Abstract

This paper describes the design and implementation of our new multigroup, multidimensional radiation hydrodynamics code Fornax and provides a suite of code tests to validate its application in a wide range of physical regimes. Instead of focusing exclusively on tests of neutrino radiation hydrodynamics relevant to the core-collapse supernova problem for which Fornax is primarily intended, we present here classical and rigorous demonstrations of code performance relevant to a broad range of multidimensional hydrodynamic and multigroup radiation hydrodynamic problems. Our code solves the comoving-frame radiation moment equations using the M1 closure, utilizes conservative high-order reconstruction, employs semi-explicit matter and radiation transport via a high-order time stepping scheme, and is suitable for application to a wide range of astrophysical problems. To this end, we first describe the philosophy, algorithms, and methodologies of Fornax and then perform numerous stringent code tests that collectively and vigorously exercise the code, demonstrate the excellent numerical fidelity with which it captures the many physical effects of radiation hydrodynamics, and show excellent strong scaling well above 100,000 MPI tasks.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4];  [3]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Princeton Univ., Princeton, NJ (United States)
  4. Princeton Univ., Princeton, NJ (United States); Institute for Advanced Study, Princeton, NJ (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1525849
Report Number(s):
LA-UR-18-25082
Journal ID: ISSN 1538-4365
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal. Supplement Series (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal. Supplement Series (Online); Journal Volume: 241; Journal Issue: 1; Journal ID: ISSN 1538-4365
Publisher:
American Astronomical Society/IOP
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; methods: numerical

Citation Formats

Skinner, M. Aaron, Dolence, Joshua C., Burrows, Adam, Radice, David, and Vartanyan, David. Fornax: A Flexible Code for Multiphysics Astrophysical Simulations. United States: N. p., 2019. Web. doi:10.3847/1538-4365/ab007f.
Skinner, M. Aaron, Dolence, Joshua C., Burrows, Adam, Radice, David, & Vartanyan, David. Fornax: A Flexible Code for Multiphysics Astrophysical Simulations. United States. doi:10.3847/1538-4365/ab007f.
Skinner, M. Aaron, Dolence, Joshua C., Burrows, Adam, Radice, David, and Vartanyan, David. Thu . "Fornax: A Flexible Code for Multiphysics Astrophysical Simulations". United States. doi:10.3847/1538-4365/ab007f. https://www.osti.gov/servlets/purl/1525849.
@article{osti_1525849,
title = {Fornax: A Flexible Code for Multiphysics Astrophysical Simulations},
author = {Skinner, M. Aaron and Dolence, Joshua C. and Burrows, Adam and Radice, David and Vartanyan, David},
abstractNote = {This paper describes the design and implementation of our new multigroup, multidimensional radiation hydrodynamics code Fornax and provides a suite of code tests to validate its application in a wide range of physical regimes. Instead of focusing exclusively on tests of neutrino radiation hydrodynamics relevant to the core-collapse supernova problem for which Fornax is primarily intended, we present here classical and rigorous demonstrations of code performance relevant to a broad range of multidimensional hydrodynamic and multigroup radiation hydrodynamic problems. Our code solves the comoving-frame radiation moment equations using the M1 closure, utilizes conservative high-order reconstruction, employs semi-explicit matter and radiation transport via a high-order time stepping scheme, and is suitable for application to a wide range of astrophysical problems. To this end, we first describe the philosophy, algorithms, and methodologies of Fornax and then perform numerous stringent code tests that collectively and vigorously exercise the code, demonstrate the excellent numerical fidelity with which it captures the many physical effects of radiation hydrodynamics, and show excellent strong scaling well above 100,000 MPI tasks.},
doi = {10.3847/1538-4365/ab007f},
journal = {The Astrophysical Journal. Supplement Series (Online)},
number = 1,
volume = 241,
place = {United States},
year = {2019},
month = {2}
}

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Cited by: 9 works
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