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H 1 Modelling of magnetic fusion plasmas: from fluid to kinetic description: kinetic MHD

Auteurs : Garbet, Xavier (Auteur de la Conférence)
CIRM (Editeur )

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kinetic versus fluid descriptions MHD description kinetic description gyrokinetics two fluid MHD Ohm's law momentum equation GyroFluid GyroLandauFluid hybrid code reduced MHD internal kink modes in tokamaks reconection sawteeth ELMs fishbones six dimensional hybrid code questions of the audience

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

    Informations sur la Vidéo

    Réalisateur : Hennenfent, Guillaume
    Langue : Anglais
    Date de publication : 01/08/14
    Date de captation : 16/07/14
    Collection : Research talks
    Format : QuickTime (.mov) Durée : 01:35:03
    Domaine : Mathematical Physics
    Audience : Chercheurs ; Doctorants , Post - Doctorants
    Download : https://videos.cirm-math.fr/2014-07-23_Garbet.mp4

Informations sur la rencontre

Nom du congrès : CEMRACS : Numerical modeling of plasmas / CEMRACS : Modèles numériques des plasmas
Organisteurs Congrès : 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/

Citation Data

DOI : 10.24350/CIRM.V.18539303
Cite this video as: 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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