Modelling and analysis
- Fluid closure in plasmas: Modelling and numerical studies of closure relations: Branginskii, limited flux, non-local closure
- Turbulence: Large scale simulation (LES), variational multiscale, entropy viscosity, spectral vanishing viscosity
- Other models: Drift velocity approximation, Reduced MHD
- Coupling Equilibrium and Transport: 2D-Equilibrium + 1D Transport coupling
- Halo currents: 3D current in the resistive wall in case of disruption
Numerical methods and simulations
- High order methods: Curvilinear spectal methods, high order finite element methods, C1 methods
- Toroidal geometry, discretization methods in curvilinear coordinates
- Pressure correction scheme:Adaptation of methods usually used for incompressible flow approximation
- Anisotropy: Anisotropic mesh adaptation, adapted discretization (maximum principle)
- HPC: ITER diameter: 4m, Larmor radius of ions : 1e-3 m
Identification and control
- Inverse problems: Real time equilibrium reconstruction with pressure anisotropy and new diagnostics
- Open loop control:Determination of the voltages and heating parameters determination to optimize a discharge
- Feedback control of the plasma current profile
Applications
- ELMs (Edge Localized Modes)
- Edge plasma: X-point configuration and bi-fluids models
- Optimization of scenarii: Free boundary equilibrium evolution coupled with transport
- Ionospheric plasma: Data assimilation for a coupled transport+ electric potential model
