Turbulence Modeling in Rotating and Curved Channels: Assessing the Spalart-Shur Correction

Abstract

Aunie edapproachtosystem-rotationandstreamline-curvatureeffectsintheframeworkofsimpleeddy-viscosity turbulence models is exercised in a range of rotating and curved channel e ows. The Spalart ‐Allmaras (SA) oneequation turbulence model (Spalart, P. R., and Allmaras, S. R., “ A One-Equation Turbulence Model for Aerodynamic Flows,” AIAAPaper 92-0439, 1992 )modie ed in thismanner is shown to bequitecompetitivewith advanced nonlinear and Reynolds-stress models and to be much more accurate than the original SA model and other eddyviscosity models that are widely used for industrial e ow computations. The new term adds about 20% to the computing cost, but does not degrade convergence.