A-priori validation of scalar dissipation rate models for turbulent non-premixed flames
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Author(s)
Sitte, MP
Turquand d’Auzay, C
Giusti, A
Mastorakos, E
Chakraborty, N
Type
Journal Article
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.
Date Issued
2021-06-01
Date Acceptance
2020-09-09
Citation
Flow, Turbulence and Combustion, 2021, 107, pp.201-218
ISSN
1386-6184
Publisher
Springer Science and Business Media LLC
Start Page
201
End Page
218
Journal / Book Title
Flow, Turbulence and Combustion
Volume
107
Copyright Statement
© The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License,
which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long
as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article
are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the
material. If material is not included in the article’s Creative Commons licence and your intended use is not
permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly
from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long
as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article
are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the
material. If material is not included in the article’s Creative Commons licence and your intended use is not
permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly
from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
License URL
Identifier
https://link.springer.com/article/10.1007%2Fs10494-020-00218-x
Subjects
Science & Technology
Physical Sciences
Technology
Thermodynamics
Mechanics
Scalar dissipation rate
Large-eddy simulation
Conditional moment closure
Non-premixed flames
LARGE-EDDY SIMULATION
CONDITIONAL MOMENT CLOSURE
JET
DIFFUSION
VARIANCE
IGNITION
NUMBER
Mechanical Engineering & Transports
Fluids & Plasmas
09 Engineering
Publication Status
Published
Date Publish Online
2020-10-14