Low Mach Number Modeling of Type Ia Supernovae. II. EnergyEvolution
The convective period leading up to a Type Ia supernova (SNIa) explosion is characterized by very low Mach number flows, requiringhydrodynamical methods well-suited to long-time integration. We continuethe development of the low Mach number equation set for stellar scaleflows by incorporating the effects of heat release due to externalsources. Low Mach number hydrodynamics equations with a time-dependentbackground state are derived, and a numerical method based on theapproximate projection formalism is presented. We demonstrate throughvalidation with a fully compressible hydrodynamics code that this lowMach number model accurately captures the expansion of the stellaratmosphere as well as the local dynamics due to external heat sources.This algorithm provides the basis for an efficient simulation tool forstudying the ignition of SNe Ia.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director. Office of Science. Advanced ScientificComputing Research
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 920061
- Report Number(s):
- LBNL-58673-Pt.II; ASJOAB; R&D Project: K11001; BnR: KJ0101010; TRN: US200822%%707
- Journal Information:
- Astrophysical Journal, Vol. 649, Issue 2pt1; Related Information: Journal Publication Date: 10/02/2006; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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