Finite volume method in Salammbô-Electron for a complete diffusion model description.
Abstract
Since its development in the 90's, Salammbô-Electron, ONERA's electron radiation belt dynamics code, allowed with a high degree of fidelity, the reproduction of electron radiation belt storm-time evolutions. Outer electron radiation belt dynamics, involving particle wave interactions, implies the presence of steep cross diffusion terms. They are currently omitted in the physical model, for numerical stability considerations. Several studies stressed out their importance for a full description of the dynamic. Thereby, we initiated a recast project for Salammbô's numerical core in order to withstand the numerically challenging complete diffusion frame. This talk aims at presenting the major upgrading integrated in Salammbô, which consists in replacing the previous explicit finite difference based discretization to an implicit finite volume variant, benefiting from its conservative formulation and positivity preserving property.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMSM51I3289M
- Keywords:
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- 2720 Energetic particles: trapped;
- MAGNETOSPHERIC PHYSICS;
- 2730 Magnetosphere: inner;
- MAGNETOSPHERIC PHYSICS;
- 2753 Numerical modeling;
- MAGNETOSPHERIC PHYSICS;
- 2774 Radiation belts;
- MAGNETOSPHERIC PHYSICS