Derivation and numerical approximation of two-temperature Euler plasma model

Autor: Hervé Guillard, Afeintou Sangam, Elise Estibals

Publikováno v: Journal of Computational Physics
Journal of Computational Physics, 2021, 444, pp.48. ⟨10.1016/j.jcp.2021.110565⟩

International audience; This paper gives a derivation of the two-temperature Euler plasma system from the two-fluid MHD model. The two-temperature Euler plasma system is proved to be an asymptotic regime for weakly magnetized plasma of the two-fluid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d0c71ba2d42adcd583c3aab34353bbc
https://inria.hal.science/hal-03543365/file/TiTeEGS.pdf

An entropy preserving relaxation scheme for ten-moments equations with source terms

Autor: Bruno Dubroca, Afeintou Sangam, Christophe Berthon

Publikováno v: Communications in Mathematical Sciences
Communications in Mathematical Sciences, 2015, Communications in Mathematical Sciences, 13 (8), pp. 2119-2154. ⟨10.4310/CMS.2015.v13.n8.a7⟩
Communications in Mathematical Sciences, International Press, 2015, Communications in Mathematical Sciences, 13 (8), pp. 2119-2154. ⟨10.4310/CMS.2015.v13.n8.a7⟩

International audience; The present paper concerns the derivation of finite volume methods to approximate weak solutions of Ten-Moments equations with source terms. These equations model compressible anisotropic flows. A relaxation-type scheme is pro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1752ddfba6c54b1962881ae6321a468
http://hdl.handle.net/20.500.12278/113941

A Local Entropy Minimum Principle for Deriving Entropy Preserving Schemes

Autor: Afeintou Sangam, Bruno Dubroca, Christophe Berthon

Publikováno v: SIAM Journal on Numerical Analysis
SIAM Journal on Numerical Analysis, 2012, ⟨10.1137/100814445⟩
SIAM Journal on Numerical Analysis, Society for Industrial and Applied Mathematics, 2012, ⟨10.1137/100814445⟩

International audience; The present work deals with the establishment of stability conditions of finite volume methods to approximate weak solutions of the general Euler equations to simulate compressible flows. In oder to ensure discrete entropy ine

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aca0e3ef4036b4f73bc09f6911611347
http://hdl.handle.net/20.500.12278/119396

Electron temperature anisotropy modeling and its effect on anisotropy-magnetic field coupling in an underdense laser heated plasma

Autor: P. Charrier, J.-P. Morreeuw, Vladimir Tikhonchuk, Afeintou Sangam, B. Dubroca

Publikováno v: Journal de Physique IV Proceedings
Journal de Physique IV Proceedings, EDP Sciences, 2006, 133, pp.295
Journal de Physique IV Proceedings, 2006, 133, pp.295

The laser interaction with an underdense plasma leads to an anisotropic laser heating of electrons. This temperature anisotropy gradient in turn is the source of an early magnetic field, which has an important effect on the plasma evolution, due to t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d02bd88066ac3cd1f95487203ad4a9b5
https://hal.archives-ouvertes.fr/hal-00293558

Anisotropic instability in a laser heated plasma

Autor: Vladimir Tikhonchuk, Afeintou Sangam, J.-P. Morreeuw

Publikováno v: Physics of Plasmas. 14:053111

The theory of the Weibel instability induced by the inverse Bremsstrahlung absorption of a laser light in an underdense plasma is revisited. It is shown that previous analyses have strongly overestimated the effect by neglecting the stabilizing term

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::49716aaca18753a9e61604b5842dff3b
https://doi.org/10.1063/1.2736347