English
Modelling of magnetic fusion plasmas: from fluid to kinetic description: kinetic MHD
Post-edited
Auteurs : Garbet, Xavier (Auteur de la Conférence)
CIRM (Editeur )
76W05 - Magnetohydrodynamics and electrohydrodynamics
82D10 - Plasmas
CIRM (Editeur )
Résumé :
This lecture will present a short overview on kinetic MHD. The advantages and drawbacks of kinetic versus fluid modelling will be summarized. Various techniques to implement kinetic effects in the fluid description will be introduced with increasing complexity: bi-fluid effects, gyroaverage fields, Landau closures. Hybrid formulations, which combine fluid and kinetic approaches will be presented. It will be shown that these formulations raise several difficulties, including inconsistent ordering and choice of representation. The non linear dynamics of an internal kink mode in a tokamak will be used as a test bed for the various formulations. It will be shown that bi-fluid effects can explain to some extent fast plasma relaxations (reconnection), but cannot address kinetic instabilities due to energetic particles. Some results of hybrid codes will be shown. Recent developments and perspectives will be given in conclusion.
Codes MSC : 76W05 - Magnetohydrodynamics and electrohydrodynamics
82D10 - Plasmas
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Informations sur la Vidéo
Réalisateur : Hennenfent, GuillaumeLangue : Anglais Date de publication : 01/08/14 Date de captation : 16/07/14 Sous collection : Research talks arXiv category : Physics Domaine : Mathematical Physics Format : QuickTime (.mov) Durée : 01:35:03 Audience : Researchers Download : https://videos.cirm-math.fr/2014-07-23_Garbet.mp4 
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Informations sur la Rencontre
Nom de la rencontre : CEMRACS : Numerical modeling of plasmas / CEMRACS : Modèles numériques des plasmasOrganisateurs de la rencontre : Campos Pinto, Martin ; Charles, Frédérique ; Guillard, Hervé ; Nkonga, Boniface Dates : 21/07/14 - 29/08/14 Année de la rencontre : 2014 URL Congrès : http://smai.emath.fr/cemracs/cemracs14/
Données de citation
DOI : 10.24350/CIRM.V.18539303Citer cette vidéo: Garbet, Xavier (2014). Modelling of magnetic fusion plasmas: from fluid to kinetic description: kinetic MHD. CIRM. Audiovisual resource. doi:10.24350/CIRM.V.18539303 URI : http://dx.doi.org/10.24350/CIRM.V.18539303 |
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