Application of a New Roughness Extension for k − ω Turbulence Models
The roughness extension of Knopp, Eisfeld and Calvo (KEC)  for k – ω type turbulence models has been applied to the flow through rough pipes, over a flat plate and around the NACA 652-215 airfoil with a rough surface. The results are compared to predictions using the boundary condition originally devised by Wilcox  for rough surfaces, and to predictions with the Spalart-Allmaras model with the Boeing roughness extension by Aupoix and Spalart (ASB) . Good agreement with experiments has been achieved with respect to the influence of the roughness on the velocity profile, the skin friction coefficient and the loss in lift.
Unable to display preview. Download preview PDF.
- 1.Abbott, I.H., von Doenhoff, A.S.: Theory of Wing Sections. Dover Publications, New York (1959)Google Scholar
- 3.Hellsten, A., Laine, S.: Extension of the k ω-SST turbulence models for flows over rough surfaces. AIAA-Paper 97-3577 (1997)Google Scholar
- 6.Ljungström, B.: Wind tunnel investigations of simulatied hoar frost on a 2-dimensional wing section with and without high lift devices. FFA, Report AU-902 (1972)Google Scholar
- 8.Nikuradse, J.: Strömungsgesetze in rauhen Rohren. VDI-Forschungsheft 361 (1933)Google Scholar
- 9.Schwamborn, D., Gerhold, T., Heinrich, R.: The DLR TAU-Code: Recent Applications in Research and Industry. In: Wesseling, P., Oñate, P.J. (eds.) Proceedings of ECCOMAS (2006)Google Scholar
- 10.Spalart, P.R., Allmaras, S.R.: A One-Equation Turbulence Model for Aerodynamic Flows. AIAA-Paper, 92-439 (1992)Google Scholar