A coarse-grained transport model for neutral particles in turbulent plasmas - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physics of Plasmas Année : 2012

A coarse-grained transport model for neutral particles in turbulent plasmas

Résumé

The transport of neutral particles in turbulent plasmas is addressed from the prospect of developing coarse-grained transportmodels which can be implemented in code suites like B2-EIRENE, currently used for designing the ITER divertor. The statistical properties of turbulent fluctuations are described by a multivariate Gamma distribution able to retain space and time correlations through a proper choice of covariance function. We show that in the scattering free case, relevant for molecules and impurity atoms, the average neutral particle density obeys a Boltzmann equation with an ionization rate renormalized by fluctuations. This result lends itself to a straightforward implementation in the EIRENE Monte Carlo solver for neutral particles. Special emphasis is put on the inclusion of time correlations, and in particular on the ballistic motion of coherent turbulent structures. The role of these time dependent effects is discussed for D2 molecules and beryllium atoms. The sensitivity of our results to the assumptions on the statistical properties of fluctuations is investigated.
Fichier principal
Vignette du fichier
published_version_final.pdf (794.34 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01023293 , version 1 (11-07-2014)

Identifiants

Citer

A. Mekkaoui, Yannick Marandet, D. Reiter, P. Boerner, P. Genesio, et al.. A coarse-grained transport model for neutral particles in turbulent plasmas. Physics of Plasmas, 2012, 19 (6), pp.060701. ⟨10.1063/1.4725504⟩. ⟨hal-01023293⟩

Collections

CNRS UNIV-AMU PIIM
26 Consultations
85 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More