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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Four-equation models for Reynolds stress and turbulent heat flux predictions

Get access (open in a dialog) DOI: 10.1615/IHTC12.1410
6 pages

Resumo

Four transport equation turbulence models for turbulent heat fluxes are addressed. First, models of k-ψ, ktheta;θ  type are studied (with ψ = kaεb and ψθ = kθpεθq). Relations on the model constants are analytically derived to force the model to respect some basic physical features. As an application, a new k-ε, kθθ model, where the k-ε model is an optimised version of the high Reynolds form of Jones-Launder, has been developed and compared to available data on thermal self-similar flows. In a second part, a model of k-kl, kθ-kθlθ type is proposed which fulfills all dynamical and thermal requirements, opposite to existing models. This new model is then applied to simple self-similar flows.