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

Result code in 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>

Alternative codes found

RIV/00216208:11320/21:10439825

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GA19-15008S" target="_blank" >GA19-15008S: Star formation efficiency in massive star clusters</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Volume of the periodical

505

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

25

Pages from-to

3730-3754

UT code for WoS article

000671481700046

EID of the result in the Scopus database

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