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The ASCI/Alliances Center for Astrophysical Thermonuclear FlashesThe University of Chicago
Type Ia Supernovae and Cosmology
M ~ 0.3, ~ 0.7Smoldering
• Subsonic convection in core of white dwarf• Anelastic module or limited study with compressible flash• Conductive heat transport
Lightcurve• Free expansion of envelope• Multi-group (non-LTE) radiation transport
Flame• Initially compressible deflagration• DDT or expansion/recollapse• Flash (compressible module) with appropriate sub-grid model and front-tracking• Conductive heat transport
~1000 yr
Ignition
~seconds
The ASCI/Alliances Center for Astrophysical Thermonuclear FlashesThe University of Chicago
Flash Capabilities for Type Ia Supernovae
Compressible Hydrodynamics Adaptive Mesh Refinement (AMR) Numerous Equations of State Self-Gravity (multipole, multigrid) Cartesian, Cylindrical, and Spherical Geometries
Advection-Diffusion Flame ModelNumerous Nuclear Reaction Networks
Monte Carlo 3-D Radiation Transfer