Publication de 6 numéros par an
ISSN Imprimer: 2152-5102
ISSN En ligne: 2152-5110
Indexed in
On Intrinsic Errors in Turbulence Models Based on Reynolds-Averaged Navier-Stokes Equations
RÉSUMÉ
Results from the recent literature are reviewed to demonstrate the prevalence of modeling errors throughout the construction of eddy viscosity and Reynolds stress turbulence closure models for the Reynolds-averaged Navier-Stokes equations of incompressible flow. A straightforward analysis is presented to show the effects of these errors on the temporal development and spatial distribution of errors in mean flow quantities. This analysis indicates that solutions to the Reynolds-averaged equations can coincide with correspondingly averaged solutions of the Navier-Stokes equations only in the case that exact Reynolds stresses are employed in solving the Reynolds-averaged equations. In all other cases an O(1) error is shown to occur. It follows that computed results obtained from the Reynolds-averaged equations with typical turbulence closure models cannot be equivalent to correspondingly averaged solutions of the Navier-Stokes equations.
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Mukerji S., Mcdonougha J.M., Mengüç M.P., Manickavasagam S., Chung S., Chaotic map models of soot fluctuations in turbulent diffusion flames, International Journal of Heat and Mass Transfer, 41, 24, 1998. Crossref