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Scientific article
English

A drift-kinetic Semi-Lagrangian 4D code for ion turbulence simulation

Published inJournal of computational physics, vol. 217, no. 2, p. 395-423
Publication date2006
Abstract

A new code is presented here, named Gyrokinetic SEmi-LAgragian (GYSELA) code, which solves 4D drift-kinetic equations for ion temperature gradient driven turbulence in a cylinder (r, θ, z). The code validation is performed with the slab ITG mode that only depends on the parallel velocity. This code uses a semi-Lagrangian numerical scheme, which exhibits good properties of energy conservation in non-linear regime as well as an accurate description of fine spatial scales. The code has been validated in the linear and non-linear regimes. The GYSELA code is found to be stable over long simulation times (more than 20 times the linear growth rate of the most unstable mode), including for cases with a high resolution mesh (δr ∼ 0.1 Larmor radius, δz ∼ 10 Larmor radius).

Keywords
  • Semi-Lagrangian
  • Leap-frog
  • Time-splitting
  • Drift-kinetic
  • Ion-temperature-gradient
  • Conservation laws
Affiliation Not a UNIGE publication
Citation (ISO format)
GRANDGIRARD, V. et al. A drift-kinetic Semi-Lagrangian 4D code for ion turbulence simulation. In: Journal of computational physics, 2006, vol. 217, n° 2, p. 395–423. doi: 10.1016/j.jcp.2006.01.023
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Article (Published version)
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ISSN of the journal0021-9991
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Technical informations

Creation09/05/2016 1:45:00 PM
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