Geodesic
Simulation of the collision dynamics of molecular clouds using heterogeneous systems
Sibirskij žurnal industrialʹnoj matematiki, Tome 26 (2023) no. 1, pp. 150-160.

Voir la notice de l'article provenant de la source Math-Net.Ru

The paper presents the results of computer simulation of the collision of rotating mo-lecular clouds in the interstellar medium. As the matter is compressed in the cloud collision region, the gas density increases here, the Jeans wavelength decreases, which leads to a change in the shape and fragmentation of clouds and their remnants. The density of gas in these clumps increases by many orders of magnitude, gravitationally bound regions arise with the possible formation of star clusters in these zones. The process of star origination is accompanied by complex spatial and temporal transformations of interstellar gas, determined by the nonlinear interaction of the turbulence of the medium, gravity, changes in the distribution of the magnetic field and radiation at the prestellar stage of evolution. The rotation of molecular clouds has a great influence on the ongoing processes. The effects of rotation in the modeling of collision processes began to be taken into account in simulation relatively recently. The evolution of pre-stellar regions, from the time they originate in high energy streams to the time they reach protostellar density, spans a huge range of scales, leading to a major computational problem in numerical simulation. Modeling of such astrophysical processes on ultra-high-resolution computa-tional grids requires a significant increase in computer power with the organization of parallel computing on heterogeneous systems.
Keywords: computational astrophysics, molecular cloud collision, fragmentation of new formations, parallel programming. . 
@article{SJIM_2023_26_1_a13,
     author = {B. P. Rybakin and V. D. Goryachev},
     title = {Simulation of the collision dynamics of molecular clouds using heterogeneous systems},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {150--160},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {2023},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2023_26_1_a13/}
}
TY  - JOUR
AU  - B. P. Rybakin
AU  - V. D. Goryachev
TI  - Simulation of the collision dynamics of molecular clouds using heterogeneous systems
JO  - Sibirskij žurnal industrialʹnoj matematiki
PY  - 2023
SP  - 150
EP  - 160
VL  - 26
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SJIM_2023_26_1_a13/
LA  - ru
ID  - SJIM_2023_26_1_a13
ER  - 
%0 Journal Article
%A B. P. Rybakin
%A V. D. Goryachev
%T Simulation of the collision dynamics of molecular clouds using heterogeneous systems
%J Sibirskij žurnal industrialʹnoj matematiki
%D 2023
%P 150-160
%V 26
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SJIM_2023_26_1_a13/
%G ru
%F SJIM_2023_26_1_a13
B. P. Rybakin; V. D. Goryachev. Simulation of the collision dynamics of molecular clouds using heterogeneous systems. Sibirskij žurnal industrialʹnoj matematiki, Tome 26 (2023) no. 1, pp. 150-160. http://geodesic.mathdoc.fr/item/SJIM_2023_26_1_a13/

[1] C. L. Dobbs, M. R. Krumholz et al, “Formation of molecular clouds and global conditions for star formation”, Protostars Planets VI, 2014, 3–26 | MR

[2] G. X. Li, F. Wyrowski, K. Menten, “Revealing a spiral-shaped molecular cloud in our galaxy: Cloud fragmentation under rotation and gravity”, Astronomy Astrophysics, 598 (2017), 96

[3] M. A. Skinner et al, “FORNAX: A flexible code for multiphysics astrophysical simulations astrophys”, J. Suppl. Ser., 241 (2019), 7 | DOI

[4] RAMSES, https://www.ics.uzh.ch/t̃eyssier/ramses/RAMSES.html

[5] E. Vazquez-Semadeni, al. at, “Molecular cloud evolution. II. From cloud formation to the early stages of star formation in decaying conditions”, Astrophys. J., 657 (2007), 870–883 | DOI

[6] “Star Formation Triggering by Cloud-Cloud Collision”, Publ. Astronom. Soc. Japan, 70:SP2 (2018)

[7] E. R. Parkin, J. M. Pittard, “Numerical heat conduction in hydrodynamical models of colliding hypersonic flows”, Monthly Notices Royal Astronom. Soc., 406 (2010), 2373–2385 | DOI

[8] D. Folini, R. Walder, “Supersonic turbulence in shock-bound interaction zones I. Symmetric settings”, Astronomy Astrophysics, 459 (2006), 1–19 | DOI | Zbl

[9] A. D. McLeod, A. P. Whitworth, “Simulations of the non-linear thin shell instability”, Monthly Notices Royal Astronom. Soc., 431 (2013), 710–721 | DOI

[10] D. Calderon et al, “Three-dimensional simulations of clump formation in stellar wind collision”, Monthly Notices Royal Astronom. Soc., 493 (2020), 447–467 | DOI

[11] E. T. Vishniac, “Nonlinear instabilities in shock-bounded slabs”, Astrophys. J., 428 (1994), 186–208 | DOI

[12] M. Wolfe, The OpenACC applications programming interface. Version 2.0., PGInsider. Technical News from PGI, 2013

[13] Coarray FORTRAN documentation, https://software.intel.com/content/www/us/en/develop/documentation/fortran-compiler-coarray-tutorial/top.html

[14] B. Rybakin, V. Goryachev, “Modeling of density stratification and filamentous structure formation in molecular clouds after shock wave collision”, Computers and Fluids, 173 (2018), 189–194 | DOI | MR | Zbl

[15] B. Rybakin, V. Goryachev, “Parallel algorithms for astrophysics problems”, Lobachevskii J. Math., 39:4 (2018), 562–570 | DOI | MR | Zbl

[16] A. Habe, K. Ohta, “Gravitational instability induced by a cloud-cloud collision: the case of head-on collision between clouds with different sizes and densities”, Publ. Astronom. Soc. Japan, 44 (1992), 203–226

[17] T. Kimura, M. Tosa, “Collision of clumpy molecular clouds”, Astronomy Astrophysics, 308 (1996), 979–987

[18] O. Berne, N. Marcelino, J. Cernicharo, “Waves on the surface of the Orion molecular cloud”, Nature Lett., 466:7309 (2010), 947–949 | DOI

[19] O. Berne, Y. Matsumoto, “The Kelvin-Helmholtz instability in Orion: A source of turbulence and chemical mixing”, Astrophys. J. Lett., 761:L4 (2012), 1–5

[20] D. Hubber, C. Batty, A. McLeod, A. Whitworth, “SEREN a new SPH code for star and planet formation simulations. Algorithms and test”, Astronomy Astrophysics, 529 (2011), 1–27