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EFFICIENT COMPUTATION OF COORDINATE-FREE MODELS OF FLAME FRONTS

Published online by Cambridge University Press:  29 April 2021

B. F. AKERS*
Affiliation:
Department of Mathematics and Statistics, Air Force Institute of Technology, WPAFB, OH 45433, USA
D. M. AMBROSE
Affiliation:
Department of Mathematics, Drexel University, Philadelphia, PA 19104, USA; dma68@drexel.edu.
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Abstract

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We present an efficient, accurate computational method for a coordinate-free model of flame front propagation of Frankel and Sivashinsky. This model allows for overturned flames fronts, in contrast to weakly nonlinear models such as the Kuramoto–Sivashinsky equation. The numerical procedure adapts the method of Hou, Lowengrub and Shelley, derived for vortex sheets, to this model. The result is a nonstiff, highly accurate solver which can handle fully nonlinear, overturned interfaces, with similar computational expense to methods for weakly nonlinear models. We apply this solver both to simulate overturned flame fronts and to compare the accuracy of Kuramoto–Sivashinsky and coordinate-free models in the appropriate limit.

Information

Type
Research Article
Copyright
© Australian Mathematical Society 2021