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A Posteriori Assessment of Algebraic Scalar Dissipation Models for RANS Simulation of Premixed Turbulent Combustion

Lookup NU author(s): Dr Umair AhmedORCiD



This is the authors' accepted manuscript of an article that has been published in its final definitive form by Springer, 2018.

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This paper examines the effects of scalar dissipation rate modelling on mean reaction rate predictions in turbulent premixed flames. The sensitivity of the mean reaction rate is explored by using different closures for scalar dissipation and the sensitivity of the scalar dissipation models themselves is also examined with respect to their defining constants. The influence of different scalar dissipation models on the flame location and mean velocities is reported and compared with experimental results. The predicted reaction rate is found to be sensitive to the choice of closure used for scalar dissipation and also to the respective constants used in the scalar dissipation models. It is also found that the scalar dissipation models involving chemical and turbulent time scales yield a more physically plausible reaction rate when compared with the scalar dissipation models relying only on the turbulent time scale.

Publication metadata

Author(s): Ahmed U, Prosser R

Publication type: Article

Publication status: Published

Journal: Flow, Turbulence and Combustion

Year: 2018

Volume: 100

Issue: 1

Pages: 39-73

Print publication date: 01/01/2018

Online publication date: 14/06/2017

Acceptance date: 29/05/2017

Date deposited: 05/08/2018

ISSN (print): 1386-6184

ISSN (electronic): 1573-1987

Publisher: Springer


DOI: 10.1007/s10494-017-9824-z


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