Critical evaluation of two-equation models for near-wall turbulence

Critical evaluation of two-equation models for near-wall turbulence

A variety of two-equation turbulence models - including several versions of the K- epsilon model as well as the K- omega model - are analyzed critically for near wall turbulent flows from a theoretical and computational standpoint. It is shown that the K- epsilon model has two major problems associa...

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Veröffentlicht in:AIAA journal 1992, Vol.30 (2), p.324-331
Hauptverfasser: Speziale, Charles G, Abid, Ridha, Anderson, E. Clay
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Sprache:eng
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Fluid Mechanics And Heat Transfer
turbulent flow
viscosity
walls
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Abid, Ridha
Anderson, E. Clay
description A variety of two-equation turbulence models - including several versions of the K- epsilon model as well as the K- omega model - are analyzed critically for near wall turbulent flows from a theoretical and computational standpoint. It is shown that the K- epsilon model has two major problems associated with it: the lack of natural boundary conditions for the dissipation rate and the appearance of higher-order correlations in the balance of terms for the dissipation rate at the wall. It is demonstrated that this new model yields improved predictions for turbulent boundary layers.
doi_str_mv 10.2514/3.10922
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source NASA Technical Reports Server; Alma/SFX Local Collection
subjects Fluid Mechanics And Heat Transfer
turbulent flow
viscosity
walls
title Critical evaluation of two-equation models for near-wall turbulence
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