NKONGA , B

This work is devoted to a review of different modifications proposed to enable compressible flow solvers to compute accurately flows near the incompressible limit. First the reasons of the failure of upwind solvers to obtain accurate solutions in the low Mach number regime are explained. Then different correction methods proposed in the...

The understanding of magnetohydrodynamic (MHD) instabilities is quite essential for the optimization of magnetically confined plasmas, a subject raising increasing interest as tokamak reactor design advances and projects such as ITER (International Thermonuclear Experimental Reactor) develop. Given the need and importance of numerically...

In the scrape-off layer (SOL) of tokamaks, the flow acceleration due to the presence of limiter or divertor plates rises the plasma velocity in a sonic regime. These high velocities imply the presence of a strong shear between the SOL and the core of the plasma that can possibly trigger some parallel shear flow instability. The existence of...

Our global understanding of the power exhaust in tokamaks, and its implications for both steady-state and transient heat loads on divertor and limiter PFCs, is still poor. In transient situations in particular, such as during start-up or control operations, the evolution of particles and heat fluxes is little known, although being critical for...