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Titre :
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Multigrid computation of incompressible flows using two-equation turbulence models : Part 1. Numerical method
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Auteurs :
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X. Zheng ;
C. Liao ;
C. Liu ;
AL Et
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Type de document :
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article/chapitre/communication
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Année de publication :
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1997
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Format :
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p.893-899
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Langues:
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= Anglais
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Catégories :
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THERMIQUE THERMODYNAMIQUE
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Mots-clés:
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METHODE NUMERIQUE
;
MECANIQUE DES FLUIDES
;
COMPRESSIBILITE
;
MODELE
;
ECOULEMENT TURBULENT
;
EQUATION DE NAVIER STOKE
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Résumé :
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A highly efficient numerical approach based on multigrid and preconditioning methods is developed for modeling 3-D incompressible turbulent flows. The incompressible Reynolds-averaged Navier-Stokes equations are written in pseudo-compressibility form, then a preconditioning method is used to reduce the wave speed disparity. The k-omega and k-epsilon turbulence models are used to estimate the effects of turbulence. The model equations are solved together with the N-S equations in a strongly-coupled way, and all the acceleration techniques originally developed for N-S equations are also used for the turbulence model equations. A point-implicit technique is developed to improve the efficiency of the solution of the turbulence model equations.
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Source :
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Journal of fluid engineering, vol 119
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