A-Priori Validation of Scalar Dissipation Rate Models for Turbulent Non-Premixed Flames
Publication Date
2020-10-14ISSN
1386-6184
Publisher
Springer Netherlands
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Sitte, M. P., Turquand d’Auzay, C., Giusti, A., Mastorakos, E., & Chakraborty, N. (2020). A-Priori Validation of Scalar Dissipation Rate Models for Turbulent Non-Premixed Flames. https://doi.org/10.1007/s10494-020-00218-x
Description
Funder: Engineering and Physical Sciences Research Council; doi: http://dx.doi.org/10.13039/501100000266
Funder: University of Cambridge
Abstract
Abstract: The modelling of scalar dissipation rate in conditional methods for large-eddy simulations is investigated based on a priori direct numerical simulation analysis using a dataset representing an igniting non-premixed planar jet flame. The main objective is to provide a comprehensive assessment of models typically used for large-eddy simulations of non-premixed turbulent flames with the Conditional Moment Closure combustion model. The linear relaxation model gives a good estimate of the Favre-filtered scalar dissipation rate throughout the ignition with a value of the related constant close to the one deduced from theoretical arguments. Such value of the constant is one order of magnitude higher than typical values used in Reynolds-averaged approaches. The amplitude mapping closure model provides a satisfactory estimate of the conditionally filtered scalar dissipation rate even in flows characterised by shear driven turbulence and strong density variation.
Keywords
Article, Scalar dissipation rate, Large-eddy simulation, Conditional moment closure, Non-premixed flames
Sponsorship
UKCTRF ((EP/R029369/1))
Identifiers
s10494-020-00218-x, 218
External DOI: https://doi.org/10.1007/s10494-020-00218-x
This record's URL: https://www.repository.cam.ac.uk/handle/1810/329482
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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