A new model for deflagration fronts in reactive fluids

Details A new model for deflagration fronts in reactive fluids A new model for deflagration fronts in reactive fluids

1998-12-07

arxiv.org/abs/astro-ph/9812119v2

Astronomy and Astrophysics

Astrophysics

11 pages, 13 figures, accepted by A&A, corrected and extended according to referee's comments

Scientific paper

We present a new way of modeling deflagration fronts in reactive fluids, the main emphasis being on turbulent thermonuclear deflagration fronts in white dwarfs undergoing a Type Ia supernova explosion. Our approach is based on a level set method which treats the front as a mathematical discontinuity and allows full coupling between the front geometry and the flow field. With only minor modifications, this method can also be applied to describe contact discontinuities. Two different implementations are described and their physically correct behaviour for simple testcases is shown. First results of the method applied to the concrete problems of Type Ia supernovae and chemical hydrogen combustion are briefly discussed; a more extensive analysis of our astrophysical simulations is given in (Reinecke et al. 1998, MPA Green Report 1122b).

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