Computational Astrophysics at EPSAM with the ClusterVision KHAOS high-performance cluster computer


Intro
Some results from recent runs
Current team members

Intro

We are performing hydrodynamic simulations of convection in stellar interiors. Wir are especially interested in stellar regions in which the elements are formed through nucleosyntesis. Our science applications will include a wide range of phases of stellar evolution, including certain questions in massive stars of zero or extremely low metallicity, or in accreting stars. Right now (April 2007) we are doing tests on the KHAOS cluster with the LCSE PPM code on He-shell flash simulations. For past results see here.

Some results from recent runs

In order to test the KHAOS cluster we ran 512x512x64 3D CFD simulation of our He-shell flash convection setup, in which a convectively unstable layer is continuously perturbed from the bottom by release of energy from nuclear burning. The unstable layer is bounded by stable layers above and below. The movie shows the onset and initial evolution of convection. Color indicates vertical velocity, with yellow beeing positive (up) velocities, and purple represents decending motions. This test run simualates 12min real time and required 4000CPU hrs. It ran for 58hrs on 64 cores (16 nodes).

Current team members


Falk Herwig, Last update: Thu May 10 22:36:56 BST 2007 , WWW home