Numerical Stability of Detonations in White Dwarf Simulations
Abstract
Some simulations of Type Ia supernovae feature self-consistent thermonuclear detonations. However, these detonations are not meaningful if the simulations are not resolved, so it is important to establish the requirements for achieving a numerically converged detonation. In this study we examine a test detonation problem inspired by collisions of white dwarfs. This test problem demonstrates that achieving a converged thermonuclear ignition requires spatial resolution much finer than 1 km in the burning region. Current computational resource constraints place this stringent resolution requirement out of reach for multi-dimensional supernova simulations. Consequently, contemporary simulations that self-consistently demonstrate detonations are possibly not converged and should be treated with caution.
- Authors:
-
[1];
[2]
- NVIDIA Corporation, Santa Clara, CA (United States)
- Stony Brook Univ., NY (United States). Dept. of Physics and Astronomy
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Stony Brook Univ., NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1529952
- Alternate Identifier(s):
- OSTI ID: 1593460
- Grant/Contract Number:
- FG02-87ER40317; AC05-00OR22725; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); Journal Volume: 874; Journal Issue: 2; Journal ID: ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Katz, Max P., and Zingale, Michael. Numerical Stability of Detonations in White Dwarf Simulations. United States: N. p., 2019.
Web. doi:10.3847/1538-4357/ab0c00.
Katz, Max P., & Zingale, Michael. Numerical Stability of Detonations in White Dwarf Simulations. United States. https://doi.org/10.3847/1538-4357/ab0c00
Katz, Max P., and Zingale, Michael. Thu .
"Numerical Stability of Detonations in White Dwarf Simulations". United States. https://doi.org/10.3847/1538-4357/ab0c00. https://www.osti.gov/servlets/purl/1529952.
@article{osti_1529952,
title = {Numerical Stability of Detonations in White Dwarf Simulations},
author = {Katz, Max P. and Zingale, Michael},
abstractNote = {Some simulations of Type Ia supernovae feature self-consistent thermonuclear detonations. However, these detonations are not meaningful if the simulations are not resolved, so it is important to establish the requirements for achieving a numerically converged detonation. In this study we examine a test detonation problem inspired by collisions of white dwarfs. This test problem demonstrates that achieving a converged thermonuclear ignition requires spatial resolution much finer than 1 km in the burning region. Current computational resource constraints place this stringent resolution requirement out of reach for multi-dimensional supernova simulations. Consequently, contemporary simulations that self-consistently demonstrate detonations are possibly not converged and should be treated with caution.},
doi = {10.3847/1538-4357/ab0c00},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 874,
place = {United States},
year = {Thu Apr 04 00:00:00 EDT 2019},
month = {Thu Apr 04 00:00:00 EDT 2019}
}
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