Power-Law Wrinkling Turbulence-Flame Interaction Model for Astrophysical Flames

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dc.contributor.author Jackson, Aaron P.
dc.contributor.author Townsley, D. M.
dc.contributor.author Calder, Alan C.
dc.date.accessioned 2018-08-23T18:31:28Z
dc.date.available 2018-08-23T18:31:28Z
dc.date.issued 2014-04-01
dc.identifier.citation Jackson, A., Townsley, D., Calder, A. (2014): Power-Law Wrinkling Turbulence-Flame Interaction Model for Astrophysical Flames. The Astronomical Journal, 784(2). en_US
dc.identifier.uri http://ir.ua.edu/handle/123456789/3748
dc.description.abstract We extend a model for turbulence–flame interactions (TFI) to consider astrophysical flames with a particular focus on combustion in Type Ia supernovae. The inertial range of the turbulent cascade is nearly always under-resolved in simulations of astrophysical flows, requiring the use of a model in order to quantify the effects of subgrid-scale wrinkling of the flame surface. We provide implementation details to extend a well-tested TFI model to low-Prandtl number flames for use in the compressible hydrodynamics code flash. A local, instantaneous measure of the turbulent velocity is calibrated for flash and verification tests are performed. Particular care is taken to consider the relation between the subgrid rms turbulent velocity and the turbulent flame speed, especially for high-intensity turbulence where the turbulent flame speed is not expected to scale with the turbulent velocity. Finally, we explore the impact of different TFI models in full-star, three-dimensional simulations of Type Ia supernovae. en_US
dc.format.mimetype application/pdf
dc.subject hydrodynamics en_US
dc.subject nuclear reactions, nucleosynthesis, abundances en_US
dc.subject supernovae: general en_US
dc.subject turbulence en_US
dc.title Power-Law Wrinkling Turbulence-Flame Interaction Model for Astrophysical Flames en_US
dc.type text en_US

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