TURBULENT OXYGEN FLAMES IN TYPE Ia SUPERNOVAE
نویسندگان
چکیده
منابع مشابه
Turbulent Oxygen Flames in Type Ia Supernovae
In previous studies, we examined turbulence-flame interactions in carbonburning thermonuclear flames in Type Ia supernovae. In this study, we consider turbulence-flame interactions in the trailing oxygen flames. The two aims of the paper are to examine the response of the inductive oxygen flame to intense levels of turbulence, and to explore the possibility of transition to detonation in the ox...
متن کاملModeling Turbulent Nuclear Flames in Type Ia Supernovae
In this paper we present the application of the so-called level set method as a ame model in simulations of Type Ia supernovae. After giving a short introduction and motivation for our choice, we discuss two diierent implementations and preliminary results of test calculations and SN Ia explosions.
متن کاملDistributed Flames in Type Ia Supernovae
At a density near a few ×10 g cm, the subsonic burning in a Type Ia supernova enters the distributed regime (high Karlovitz number). In this regime, turbulence disrupts the internal structure of the flame, and so the idea of laminar burning propagated by conduction is no longer valid. The nature of the burning in this distributed regime depends on the turbulent Damköhler number (DaT ), which st...
متن کاملThe Physics of Flames in Type Ia Supernovae
We extend a low Mach number hydrodynamics method developed for terrestrial combustion, to the study of thermonuclear flames in Type Ia supernovae. We discuss the differences between 2-D and 3-D Rayleigh-Taylor unstable flame simulations, and give detailed diagnostics on the turbulence, showing that the kinetic energy power spectrum obeys Bolgiano-Obukhov statistics in 2-D, but Kolmogorov statis...
متن کاملThe ignition of thermonuclear flames in Type Ia supernovae
In the framework of the Chandrasekhar-mass deflagration model for Type Ia supernovae (SNe Ia), a persisting free parameter is the initial morphology of the flame front, which is linked to the ignition process in the progenitor white dwarf. Previous analytical models indicate that the thermal runaway is driven by temperature perturbations (“bubbles”) that develop in the white dwarf’s convective ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2011
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/730/2/144