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A k-epsilon modeling of near wall turbulence

Author
Shih, T. H.
Published
Sep 1, 1991.
Physical Description
1 electronic document
Additional Creators
Yang, Z.
Online Version

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Summary
A k-epsilon model is proposed for turbulent bounded flows. In this model, the turbulent velocity scale and turbulent time scale are used to define the eddy viscosity. The time scale is shown to be bounded from below by the Kolmogorov time scale. The dissipation equation is reformulated using the time scale, removing the need to introduce the pseudo-dissipation. A damping function is chosen such that the shear stress satisfies the near wall asymptotic behavior. The model constants used are the same as the model constants in the commonly used high turbulent Reynolds number k-epsilon model. Fully developed turbulent channel flows and turbulent boundary layer flows over a flat plate at various Reynolds numbers are used to validate the model. The model predictions were found to be in good agreement with the direct numerical simulation data.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19910023146.
Accession ID: 91N32460.
ICOMP-91-16.
NASA-TM-105238.
E-6563.
NAS 1.15:105238.
CMOTT-91-06.
International Symposium on Computational Fluid Dynamics; 9-12 Sep. 1991; Davis, CA; United States.
Terms of Use and Reproduction
No Copyright.
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