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Accuracy of unperturbed motion of particles in a gyrokinetic semi-Lagrangian code
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.
Cited literature [9 references]
https://hal.inria.fr/hal-00727118
Contributor : Guillaume Latu Connect in order to contact the contributor
Submitted on : Monday, September 3, 2012 - 12:21:22 PM
Last modification on : Monday, December 13, 2021 - 12:02:23 PM
Long-term archiving on: : Friday, December 16, 2016 - 9:28:25 AM
Contributor : Guillaume Latu Connect in order to contact the contributor
Submitted on : Monday, September 3, 2012 - 12:21:22 PM
Last modification on : Monday, December 13, 2021 - 12:02:23 PM
Long-term archiving on: : Friday, December 16, 2016 - 9:28:25 AM
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RR-8054.pdf
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