Near-wall turbulence modelling with elliptic relaxation approach
by M.M. Rahman, T. Siikonen
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 8, No. 5, 2008

Abstract: A low-Reynolds number κ-ε^~ model is proposed in which the anisotropic production in near-wall regions is accounted for substantially by adding the cross-diffusion term in the ε^~ equation. Hence, it reduces the kinetic energy and length scale magnitudes to improve prediction of adverse pressure gradient flows, involving flow separation and reattachment. The elliptic relaxation function induces the eddy viscosity damping such that it mimics the wall-limiting behaviour. The anisotropic nature of turbulence is introduced with turbulent Prandtl numbers σ_(κ,ε) such as to provide substantial turbulent diffusion in near-wall regions. The model is validated against a few flow cases, yielding predictions in good agreement with the Direct Numerical Simulation (DNS) and experimental data.

Online publication date: Mon, 14-Jul-2008

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the Progress in Computational Fluid Dynamics, An International Journal (PCFD):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com