Physics – Fluid Dynamics
Scientific paper
Nov 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aps..dfd.mm004a&link_type=abstract
American Physical Society, 62nd Annual Meeting of the APS Division of Fluid Dynamics, November 22-24, 2009, abstract #MM.004
Physics
Fluid Dynamics
Scientific paper
High-resolution three-dimensional simulations of carbon-burning flames in type Ia supernovae are used to examine the distributed burning regime (high Karlovitz numbers), or the ``small-scale turbulence'' regime as it was referred to by Damk"ohler (1940). He predicted that the turbulent flame speed and width are determined by the nuclear burning time scale and a diffusion coefficient prescribed by the turbulence. The scaling predicts its own breakdown when the turbulent Damk"ohler number reaches unity. We demonstrate that the simulations are in agreement with the scaling predictions, and propose a method for predicting the limiting flame speed and width based on small-scale simulations. This flame speed can then be used to construct a turbulent flame model to study very large scale distributed supernova flames.
Aspden Andrew
Bell John
Woosley Stan
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