Low Mach Number Modeling of Type Ia Supernovae. II. EnergyEvolution [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2006.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators:: United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information

Access Online

www.osti.gov

Availability

Finding items...

Restrictions on Access:

Free-to-read Unrestricted online access

Summary:

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.

Report Numbers:

E 1.99:lbnl--58673-pt.ii
lbnl--58673-pt.ii

Other Subject(s):

Note:

Published through SciTech Connect.
03/28/2006.
"lbnl--58673-pt.ii"
": KJ0101010"
Astrophysical Journal 649 2pt1 ISSN 0004-637X; ASJOAB FT
Bell, John B.; Rendleman, Charles A.; Almgren, Ann S.; Zingale,Mike.
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)

Funding Information:

DE-AC02-05CH11231
K11001

View MARC record | catkey: 14345635