Non-ideal self-gravity and cosmology: the importance of correlations in the dynamics of the large-scale structures of the Universe

Autor: Tremblin, P., Chabrier, G., Padioleau, T., Daley-Yates, S.

Publikováno v: A&A 659, A108 (2022)

Inspired by the statistical mechanics of an ensemble of interacting particles (BBGKY hierarchy), we propose to account for small-scale inhomogeneities in self-gravitating astrophysical fluids by deriving a non-ideal Virial theorem and non-ideal Navie

Externí odkaz: http://arxiv.org/abs/2109.09087

A high-performance and portable asymptotic preserving radiation hydrodynamics code with the M1 model

Autor: Bloch, H., Tremblin, P., González, M., Padioleau, T., Audit, E.

Publikováno v: A&A 646, A123 (2021)

Aims. We present a new radiation hydrodynamics code, called "ARK-RT" which uses a two-moment model with the M1 closure relation for radiative transfer. This code aims at being ready for high-performance computing, on exascale architectures. Methods.

Externí odkaz: http://arxiv.org/abs/2011.13926

Thermo-compositional diabatic convection in the atmospheres of brown dwarfs and in Earth's atmosphere and oceans

Autor: Tremblin, P., Padioleau, T., Phillips, M., Chabrier, G., Baraffe, I., Fromang, S., Audit, E., Bloch, H., Burgasser, A. J., Drummond, B., Gonzalez, M., Kestener, P., Kokh, S., Lagage, P. -O., Stauffert, M.

By generalizing the theory of convection to any type of thermal and compositional source terms (diabatic processes), we show that thermohaline convection in Earth oceans, fingering convection in stellar atmospheres, and moist convection in Earth atmo

Externí odkaz: http://arxiv.org/abs/1902.03553

New advances to prepare GYSELA-X code for exascale global gyrokinetic plasma turbulence simulations: porting on GPU and ARM architectures

Autor: Grandgirard, Virginie, Obrejan, Kevin, Midou, Dorian, Asahi, Y, Bernard, P-E, Bigot, J, Bourne, E, Dechard, J, Dif- Pradalier, G, Donnel, P, Garbet, X, Gueroudji, A, Hager, G, Murai, H, Ould-Ruis, Yacine, Padioleau, T, Nguyen, L, Peybernes, M, Sarazin, Y, Sato, M, Tsuji, M, Vezolle, P

Publikováno v: PASC22-Conderence on The Platform for Advanced Scientific Computing
PASC22-Conderence on The Platform for Advanced Scientific Computing, the Association for Computing Machinery (ACM); the Swiss National Supercomputing Centre (CSCS), Jun 2022, Bâle (virtual event), Switzerland. pp.1-21

International audience

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::0e607a50ac3e6ff1a60374015f9ffb56
https://cea.hal.science/cea-03740685

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