Affiliation:
1. Department of Mechanical Engineering, Cairo University, Cairo, Egypt
Abstract
A combustion model based on restricted chemical equilibrium is described. A transport equation for the skewness of the mixture fraction is derived. It contains two adjustable constants. The computed values of the mean mixture fraction (f) and its variance and skewness (g and s) for a jet diffusion methane flame are used to obtain the shape of a skewed pdf. The skewed pdf is split into a turbulent part (beta function) and a nonturbulent part (delta function) at f = 0. The contribution of each part is directly related to the values of f, g, and s. The inclusion of intermittency in the skewed pdf appreciably improves the numerical predictions obtained for a turbulent jet diffusion methane flame for which experimental data are available.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Cited by
11 articles.
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1. Preface;Computational Fluid Dynamics in Fire Engineering;2009
2. References;Computational Fluid Dynamics in Fire Engineering;2009
3. Submerged Gas Jet into a Liquid Bath: A Review;Industrial & Engineering Chemistry Research;2007-01-18
4. On modelling combustion, radiation and soot processes in compartment fires;Building and Environment;2003-06
5. On numerical comparison of enclosure fire in a multi-compartment building;Fire Safety Journal;2003-02