Multiple mapping conditioning in homogeneous reacting flows

Kronenburg, A. and Cleary, M. J. (2007). Multiple mapping conditioning in homogeneous reacting flows. In: Peter Jacobs, Tim McIntyre, Matthew Cleary, David Buttsworth, David Mee, Rose Clements, Richard Morgan and Charles Lemckert, Proceedings of Sixteenth Australasian Fluid Mechanics Conference. 16th Australasian Fluid Mechanics Conference (AFMC), Gold Coast, Queensland, Australia, (551-558). 2-7 December, 2007.

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Author Kronenburg, A.
Cleary, M. J.
Title of paper Multiple mapping conditioning in homogeneous reacting flows
Conference name 16th Australasian Fluid Mechanics Conference (AFMC)
Conference location Gold Coast, Queensland, Australia
Conference dates 2-7 December, 2007
Convener School of Engineering, University of Queensland
Proceedings title Proceedings of Sixteenth Australasian Fluid Mechanics Conference
Place of Publication Brisbane, Australia
Publisher School of Engineering, The University of Queensland
Publication Year 2007
Sub-type Fully published paper
ISBN 978-1-864998-94-8
Editor Peter Jacobs
Tim McIntyre
Matthew Cleary
David Buttsworth
David Mee
Rose Clements
Richard Morgan
Charles Lemckert
Volume 1
Start page 551
End page 558
Total pages 8
Collection year 2007
Language eng
Abstract/Summary Multiple mapping conditioning (MMC) is used to model local extinction and reignition phenomena in homogeneous, isotropic decaying turbulence. It is recognized that mixture fraction alone is not sufficient to account for turbulent scalar fluctuations and that more than one reference variable needs to be introduced. We introduce a second reference variable with a dual character: the second variable is a dissipation-like variable that emulates the intermittent behaviour of scalar dissipation and it is therefore the cause for local extinction in our modelling. However, the second variable is also used to match the scalar variance of a reaction progress variable to ensure consistency in temperature flucutations of the MMC model and Direct Numerical Simulations. The resulting model provides a (fully) closed formulation for the modelling of local extinction and re-ignition events and predictions of the joint probability distribution of mixture fraction and sensible enthalpy, of reactive species and of the global conversion rates are good and clear improvments over conventional mixture fraction based methods that use mixture fraction as the only conditioning paramenter.
Subjects 290501 Mechanical Engineering
291803 Turbulent Flows
780102 Physical sciences
E1
Q-Index Code E1

 
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Created: Wed, 19 Dec 2007, 12:35:41 EST by Laura McTaggart on behalf of School of Engineering