Special Universe Talk: Stable numerical simulations of magnetohydrodynamics and applications in ISM flows

by Christian Klingenberg (Universität Würzburg)

Friday 17 Jun 2011, 10:00 → 11:30 Europe/Berlin

Giessenbachstrasse, new seminar room (basement) (MPE, Garching)

We have built a finite volume method for ideal MHD for which we can prove stability. That is to say that even in the presence of high Mach number shock waves the scheme does not become numerically unstable. We can guarantee that even in the presence of vacuum the computed density will never drop below zero. Ingredients are: a new approximate Riemann solver, extension to multidimensions and to second order. We have extensively tested our code in the context of astrophysics. Christian will show applications of their code both in star formation and of a supernova-driven, stratified interstellar medium.