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Computation of the turbulent flow in a square duct using a cubic low-Reynolds stress model

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2009
auteur(s) Naji Hassan; Mompean Gilmar
journal (abréviation) Computer Modeling in Engineering & Sciences (Comput Model Eng Sci)
volume (numéro) 53 (2)
numéro de papier CMES201001251524
pages 181 – 206
résumé The aim of this work is to predict numerically the turbulent flow through a straight square duct using a nonlinear stress-strain model. The paper considers the application of the Craft et al.’s model [Craft, Launder, and Suga (1996)] to the case of turbulent incompressible flow in a straight square duct. In order to handle wall proximity effects, damping functions are introduced. Using a priori and a posteriori investigations, we show the performance of this model to predict such flows. The analysis of the flow anisotropy is made using the anisotropy-invariant map proposed by Lumley and Newman [Lumley and Newman (1977)]. This map shows the various possible states of the turbulence. The mean flow field and the turbulent statistics are compared with existing numerical and experimental data for square and rectangular duct flows. Overall, the model performance is shown to be satisfactory. In particular, the mean secondary velocity field and the streamwise vorticity are well predicted.
mots clés Computational fluid mechanics; Finite volume method; cubic model; realizability; square duct flow
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