Optimization of turbulence reduced model free parameters based on L-mode experiments and 2D transport simulations

Serafina Baschetti (1) , Hugo Bufferand (1) , Guido Ciraolo (1) , Nicolas Fedorczak (1) , Philippe Ghendrih (1) , Eric Serre (2) , Patrick Tamain (1)

1 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
2 M2P2 - Laboratoire de Mécanique, Modélisation et Procédés Propres

In this paper, a κ−ϵ transport model is presented as a turbulence reduction tool for a typical ohmic L‐mode discharge plasma in a divertor‐configurated tokamak. Taking a Tokamak à configuration variable (TCV) study case, a feedback loop procedure is performed using the SolEdge2D code to acquire plasma diffusivity at the outer mid‐plane. The κ−ϵ model is calibrated through its free parameters with the aim of recovering the diffusivity calculated in the feedback procedure. Finally, it is shown that the model can self‐consistently calculate diffusivity in the whole domain, recovering the poloidal asymmetries due to interchange instabilities.

Mots clés: plasma transport; reduced model; turbulence

Domaines: Sciences de l'ingénieur [physics]

Serafina Baschetti, Hugo Bufferand, Guido Ciraolo, Nicolas Fedorczak, Philippe Ghendrih, et al.. Optimization of turbulence reduced model free parameters based on L-mode experiments and 2D transport simulations. Contributions to Plasma Physics, 2018, 58 (6-8), pp.511-517. ⟨10.1002/ctpp.201700163⟩. ⟨hal-02111708⟩