Tree-based solvers for adaptive mesh refinement code flash - II: radiation transport module TreeRay

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00548922" target="_blank" >RIV/67985815:_____/21:00548922 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/21:10439825

Výsledek na webu

<a href="https://doi.org/10.1093/mnras/stab1482" target="_blank" >https://doi.org/10.1093/mnras/stab1482</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stab1482" target="_blank" >10.1093/mnras/stab1482</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tree-based solvers for adaptive mesh refinement code flash - II: radiation transport module TreeRay

Popis výsledku v původním jazyce

The treatment of radiative transfer with multiple radiation sources is a critical challenge in simulations of star formation and the interstellar medium (ISM). In this paper, we present the novel TREERAY method for solving general radiative transfer problems, based on reverse ray-tracing combined with tree-based accelerated integration. We implement TREERAY in the adaptive mesh refinement code flash, as a module of the tree solver developed by Wunsch et al. However, the method itself is independent of the host code and can be implemented in any grid-based or particle-based hydrodynamics code. A key advantage of TREERAY is that its computational cost is independent of the number of sources, making it suitable for simulations with many point sources (e.g. massive star clusters) as well as simulations where diffuse emission is important. A very efficient communication and tree-walk strategy enable TREERAY to achieve almost ideal parallel scalings. TREERAY can easily be extended with sub-modules to treat radiative transfer at different wavelengths and to implement related physical processes. Here, we focus on ionizing radiation and use the on-the-spot approximation to test the method and its parameters. The ability to set the tree solver time-step independently enables the speedy calculation of radiative transfer in a multiphase ISM, where the hydrodynamic time-step is typically limited by the sound speed of the hot gas produced in stellar wind bubbles or supernova remnants. We show that complicated simulations of star clusters with feedback from multiple massive stars become feasible with TREERAY.

Název v anglickém jazyce

Tree-based solvers for adaptive mesh refinement code flash - II: radiation transport module TreeRay

Popis výsledku anglicky

The treatment of radiative transfer with multiple radiation sources is a critical challenge in simulations of star formation and the interstellar medium (ISM). In this paper, we present the novel TREERAY method for solving general radiative transfer problems, based on reverse ray-tracing combined with tree-based accelerated integration. We implement TREERAY in the adaptive mesh refinement code flash, as a module of the tree solver developed by Wunsch et al. However, the method itself is independent of the host code and can be implemented in any grid-based or particle-based hydrodynamics code. A key advantage of TREERAY is that its computational cost is independent of the number of sources, making it suitable for simulations with many point sources (e.g. massive star clusters) as well as simulations where diffuse emission is important. A very efficient communication and tree-walk strategy enable TREERAY to achieve almost ideal parallel scalings. TREERAY can easily be extended with sub-modules to treat radiative transfer at different wavelengths and to implement related physical processes. Here, we focus on ionizing radiation and use the on-the-spot approximation to test the method and its parameters. The ability to set the tree solver time-step independently enables the speedy calculation of radiative transfer in a multiphase ISM, where the hydrodynamic time-step is typically limited by the sound speed of the hot gas produced in stellar wind bubbles or supernova remnants. We show that complicated simulations of star clusters with feedback from multiple massive stars become feasible with TREERAY.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA19-15008S" target="_blank" >GA19-15008S: Efektivita tvorby hvězd v hmotných hvězdokupách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Svazek periodika

505

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

25

Strana od-do

3730-3754

Kód UT WoS článku

000671481700046

EID výsledku v databázi Scopus

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