Persistence of linear ITG mode properties in flux-driven turbulent non-linear simulations

C. Gillot (1, 2) , Guilhem Dif-Pradalier (1) , Y. Sarazin (1) , E. Caschera (1) , Ph Ghendrih (1) , X. Garbet (1) , V. Grandgirard (1) , G. Latu (1) , C. Passeron (1) , C. Bourdelle (1) , D. Zarzoso (3)

1 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
2 ENPC - École des Ponts ParisTech
3 PIIM - Physique des interactions ioniques et moléculaires

Objective: Find a reduced description for turbulence in tokamak plasmas Method: Analysis of GYSELA simulation 3D output  What are turbulent vortices’ dynamics?  How to reduce the description? Results: • Zonal flows act as toroidal motion, and zonal shear acts as radial motion • Zonal shear yields stationary tilt of turbulent eddies • Pressure-potential phase shift distribution is narrow, around quasi-linear value • QuaLiKiz linear prediction in qualitative agreement with GYSELA simulation

Domaines: Physique [physics]

C. Gillot, Guilhem Dif-Pradalier, Y. Sarazin, E. Caschera, Ph Ghendrih, et al.. Persistence of linear ITG mode properties in flux-driven turbulent non-linear simulations. 18th European Fusion Theory Conference (EFTC), Oct 2019, Ghent, Belgium. . ⟨cea-02525183⟩