Computing ITG turbulence with a full-f semi-Lagrangian code

Virginie Grandgirard (1) , Yanick Sarazin (2) , Xavier Garbet (3) , Guilhem Dif-Pradalier , Philippe Ghendrih (1) , Nicolas Crouseilles (4, 5) , Guillaume Latu (1) , Eric Sonnendrücker (4, 5) , Nicolas Besse (4, 6, 7) , Pierre Bertrand

1 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
2 DRFC - Département de Recherche sur la Fusion Contrôlée
3 CEA/DSM/DRFC - Association EURATOM-CEA
4 CALVI - Scientific computation and visualization
5 IRMA - Institut de Recherche Mathématique Avancée
6 IJL - Institut Jean Lamour
7 IECN - Institut Élie Cartan de Nancy

This paper addresses non-linear global gyrokinetic simulations of ion temperature gradient (ITG) driven turbulence with the Gysela code. The particularity of Gysela code is to use a semi-Lagrangian (SL) scheme for the full distribution function. The 4D non-linear drift-kinetic version of the code already shows the interest in such a SL method which exhibits good properties of energy conservation. The code has been upgrated to run 5D toroidal simulations. Linear benchmarks and non-linear results are presented.

Mots clés: Gyrokinetic; Semi-Lagrangian; Ion-temperature-gradient; Plasma turbulence

Domaines: Analyse numérique [math.NA]

Virginie Grandgirard, Yanick Sarazin, Xavier Garbet, Guilhem Dif-Pradalier, Philippe Ghendrih, et al.. Computing ITG turbulence with a full-f semi-Lagrangian code. Communications in Nonlinear Science and Numerical Simulation, 2008, 13 (1), pp.81-87. ⟨10.1016/j.cnsns.2007.05.016⟩. ⟨hal-00594859⟩