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Accuracy of unperturbed motion of particles in a gyrokinetic semi-Lagrangian code

Guillaume Latu 1, 2 Virginie Grandgirard 2 Jérémie Abiteboul 2 Morgane Bergot 1 Nicolas Crouseilles 3, 4 Xavier Garbet 2 Philippe Ghendrih 2 Michel Mehrenberger 1, 5 Yanick Sarazin 2 Hocine Sellama 1 Eric Sonnendrücker 1, 5 David Zarzoso 2
1 CALVI - Scientific computation and visualization
IRMA - Institut de Recherche Mathématique Avancée, LSIIT - Laboratoire des Sciences de l'Image, de l'Informatique et de la Télédétection, Inria Nancy - Grand Est, IECL - Institut Élie Cartan de Lorraine
4 IPSO - Invariant Preserving SOlvers
IRMAR - Institut de Recherche Mathématique de Rennes, Inria Rennes – Bretagne Atlantique
Abstract : Inaccurate description of the equilibrium can yield to spurious effects in gyrokinetic turbulence simulations. Also, the Vlasov solver and time integration schemes impact the conservation of physical quantities, especially in long-term simulations. Equilibrium and Vlasov solver have to be tuned in order to preserve constant states (equilibrium) and to provide good conservation property along time (mass to begin with). Several illustrative simple test cases are given to show typical spurious effects that one can observes for poor settings. We explain why Forward Semi-Lagrangian scheme bring us some benefits. Some toroidal and cylindrical GYSELA runs are shown that use FSL.
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Contributor : Guillaume Latu <>
Submitted on : Monday, September 3, 2012 - 12:21:22 PM
Last modification on : Friday, January 8, 2021 - 3:40:50 AM
Long-term archiving on: : Friday, December 16, 2016 - 9:28:25 AM


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  • HAL Id : hal-00727118, version 1
  • ARXIV : 1209.0317


Guillaume Latu, Virginie Grandgirard, Jérémie Abiteboul, Morgane Bergot, Nicolas Crouseilles, et al.. Accuracy of unperturbed motion of particles in a gyrokinetic semi-Lagrangian code. [Research Report] RR-8054, INRIA. 2012, pp.17. ⟨hal-00727118⟩



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