Improving conservation properties of a 5D gyrokinetic semi-Lagrangian code ∗

Guillaume Latu; Virginie Grandgirard; Jérémie Abiteboul; Nicolas Crouseilles; Guilhem Dif-Pradalier; Xavier Garbet; Philippe Ghendrih; Michel Mehrenberger; Yanick Sarazin; Eric Sonnendrücker

doi:10.1140/epjd/e2014-50209-1

Improving conservation properties of a 5D gyrokinetic semi-Lagrangian code ∗

Guillaume Latu, Virginie Grandgirard, Jérémie Abiteboul, Nicolas Crouseilles, Guilhem Dif-Pradalier, Xavier Garbet, Philippe Ghendrih, Michel Mehrenberger, Yanick Sarazin, Eric Sonnendrücker

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

In gyrokinetic turbulent simulations, the knowledge of some stationary states can help reducing numerical artifacts. Considering long-term simulations, the qualities of the Vlasov solver and of the radial boundary conditions have an impact on the conservation properties. In order to improve mass and energy conservation mainly, the following methods are investigated: fix the radial boundary conditions on a stationary state, use a 4D advection operator that avoids a directional splitting, interpolate with a delta-f approach. The combination of these techniques in the semi-Lagrangian code gysela leads to a net improvement of the conservation properties in 5D simulations.

Original language	English
Article number	345
Journal	European Physical Journal D
Volume	68
Issue number	11
DOIs	https://doi.org/10.1140/epjd/e2014-50209-1
State	Published - 1 Nov 2014
Externally published	Yes

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abstract = "In gyrokinetic turbulent simulations, the knowledge of some stationary states can help reducing numerical artifacts. Considering long-term simulations, the qualities of the Vlasov solver and of the radial boundary conditions have an impact on the conservation properties. In order to improve mass and energy conservation mainly, the following methods are investigated: fix the radial boundary conditions on a stationary state, use a 4D advection operator that avoids a directional splitting, interpolate with a delta-f approach. The combination of these techniques in the semi-Lagrangian code gysela leads to a net improvement of the conservation properties in 5D simulations.",

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AU - Latu, Guillaume

AU - Grandgirard, Virginie

AU - Abiteboul, Jérémie

AU - Crouseilles, Nicolas

AU - Dif-Pradalier, Guilhem

AU - Garbet, Xavier

AU - Ghendrih, Philippe

AU - Mehrenberger, Michel

AU - Sarazin, Yanick

AU - Sonnendrücker, Eric

PY - 2014/11/1

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N2 - In gyrokinetic turbulent simulations, the knowledge of some stationary states can help reducing numerical artifacts. Considering long-term simulations, the qualities of the Vlasov solver and of the radial boundary conditions have an impact on the conservation properties. In order to improve mass and energy conservation mainly, the following methods are investigated: fix the radial boundary conditions on a stationary state, use a 4D advection operator that avoids a directional splitting, interpolate with a delta-f approach. The combination of these techniques in the semi-Lagrangian code gysela leads to a net improvement of the conservation properties in 5D simulations.

AB - In gyrokinetic turbulent simulations, the knowledge of some stationary states can help reducing numerical artifacts. Considering long-term simulations, the qualities of the Vlasov solver and of the radial boundary conditions have an impact on the conservation properties. In order to improve mass and energy conservation mainly, the following methods are investigated: fix the radial boundary conditions on a stationary state, use a 4D advection operator that avoids a directional splitting, interpolate with a delta-f approach. The combination of these techniques in the semi-Lagrangian code gysela leads to a net improvement of the conservation properties in 5D simulations.

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JO - European Physical Journal D

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Improving conservation properties of a 5D gyrokinetic semi-Lagrangian code ∗

Abstract

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