We investigate different models that are intended to describe the small mean free path regime of a kinetic equation, a particular attention being paid to the moment closure by entropy minimization. We introduce a specific asymptotic-induced numerical strategy which is able to treat the stiff terms of the asymptotic diffusive regime. We evaluate on numerics the performances of the method and the abilities of the reduced models to capture the main features of the full kinetic equation. © 2008 Springer Science+Business Media, LLC.
|Journal||Journal of Scientific Computing|
|Publication status||Published - 1 Jul 2008|
- Asymptotic preserving schemes
- Diffusion asymptotics
- Hyperbolic systems
- Moment closure