Energy dissipation in astrophysical simulations: results of the Orszag-Tang test problem

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F23%3AA0000273" target="_blank" >RIV/47813059:19630/23:A0000273 - isvavai.cz</a>
Result on the web
<a href="https://proceedings.physics.cz/wp-content/uploads/2023/12/23_25_14_kay.pdf" target="_blank" >https://proceedings.physics.cz/wp-content/uploads/2023/12/23_25_14_kay.pdf</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Energy dissipation in astrophysical simulations: results of the Orszag-Tang test problem
Original language description
The magnetic field through the magnetic reconnection process affects the dynamics and structure of astrophysical systems. Numerical simulations are the tools to study the evolution of these systems. However, the resolution, dimensions, resistivity, and turbulence of the system are some important parameters to take into account in the simulations. In this paper, we investigate the evolution of magnetic energy in astrophysical simulations by performing a standard test problem for MHD codes, Orszag-Tang. We estimate the numerical dissipation in the simulations using state-of-the-art numerical simulation code in astrophysics, PLUTO. The estimated numerical resistivity in 2D simulations corresponds to the Lundquist number ≈ 104 in the resolution of 512 × 512 grid cells. It is also shown that the plasmoid unstable reconnection layer can be resolved with sufficient resolutions. Our analysis demonstrates that in non-relativistic magnetohydrodynamics simulations, magnetic and kinetic energies undergo conversion into internal energy, resulting in plasma heating.
Czech name
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Czech description
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Project
<a href="/en/project/GX21-06825X" target="_blank" >GX21-06825X: Accreting Black Holes in the new era of X-ray polarimetry missions</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of RAGtime 23-25: Workshops on black holes and neutron stars
ISBN
9788075105776
ISSN
2336-5668
e-ISSN
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Number of pages
8
Pages from-to
135-142
Publisher name
Slezská univerzita v Opavě, Fyzikální ústav v Opavě
Place of publication
Opava
Event location
Opava
Event date
Nov 27, 2023
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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