Modeling and Simulation of Fluid Mixing for Laser Experiments and Supernova

Details Modeling and Simulation of Fluid Mixing for Laser Experiments and Supernova Modeling and Simulation of Fluid Mixing for Laser Experiments and Supernova

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aps..dfd.gs007z&link_type=abstract

American Physical Society, 58th Annual Meeting of the Division of Fluid Dynamics, November 20-22, 2005, abstract #GS.007

Physics

Fluid Dynamics

Scientific paper

Recently, laboratory astrophysics has been playing an important role in the study of astrophysical systems, especially in the case of supernova explosions through the creation of scaled reproductions of astrophysical systems in the laboratory. In collaboration with a team centered at U. Michigan and LLNL, we have conducted front tracking simulations for axisymmetrically perturbed spherical explosions relevant to supernovae as performed on NOVA laser experiments, with excellent agreement with experiments. We have extended the algorithm and its physical basis for preshock interface evolution due to radiation preheat. The preheat simulations motivate direct experimental measurements of preheat as part of any complete study of shock-driven instabilities by such experimental methods. Our second focus is to study turbulent combustion in a type Ia supernova (SN Ia) which is driven by Rayleigh-Taylor mixing. We have extended our front tracking to allow modeling of a reactive front in SN Ia. Our 2d axisymmetric simulations show a successful level of burning. Our front model contains no adjustable parameters so that variations of the explosion outcome can be linked directly to changes in the initial conditions.

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