J. C. Niemeyer et al. 1999 ApJ 524 290 doi:10.1086/307813
Small-Scale Interaction of Turbulence with Thermonuclear Flames in Type Ia Supernovae
FREEJ. C. Niemeyer1, W. K. Bushe2 and G. R. Ruetsch2
Show affiliationsMicroscopic turbulence-flame interactions of thermonuclear fusion flames occurring in Type Ia supernovae were studied by means of incompressible direct numerical simulations with a highly simplified flame description. The flame is treated as a single diffusive scalar field with a nonlinear source term. It is characterized by its Prandtl number, Pr 
1, and laminar flame speed, Slam. We find that if Slam ≥ u', where u' is the rms amplitude of turbulent velocity fluctuations, the local flame propagation speed does not significantly deviate from Slam even in the presence of velocity fluctuations on scales below the laminar flame thickness. This result is interpreted in the context of subgrid-scale modeling of supernova explosions and the mechanism for deflagration-detonation transitions.
- Subject headings
hydrodynamics; methods: numerical; supernovae: general; turbulence
- Dates
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Issue 1 (1999 October 10)
Received 1999 March 31, accepted for publication 1999 June 6
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Small-Scale Interaction of Turbulence with Thermonuclear Flames in Type Ia Supernovae
J. C. Niemeyer et al. 1999 ApJ 524 290
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