The two-equation, eddy-viscosity class of models remains the primary means of turbulence closure for most CFD applications, however these models typically are not sensitized correctly to streamline curvature or system rotation. This paper presents the development and testing of new versions of the k-omega SST turbulence model that are intended to exhibit a physically accurate response to curvature and rotation. Model development is based on a rigorous simplification of the differential Reynolds Stress Model under conditions of weak equilibrium. The new turbulence model is implemented in a commercial CFD solver and tested on several problems, including fully-developed, rotating channel flow and flow development in a U-bend. The new model performs superior to existing k-omega model forms for these cases, especially when rapid rotation or strong streamline curvature exists.
Curvature and Rotation Sensitive Variants of the K-Omega SST Turbulence Model
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Dhakal, TP, & Walters, DK. "Curvature and Rotation Sensitive Variants of the K-Omega SST Turbulence Model." Proceedings of the ASME 2009 Fluids Engineering Division Summer Meeting. Volume 1: Symposia, Parts A, B and C. Vail, Colorado, USA. August 2–6, 2009. pp. 2221-2229. ASME. https://doi.org/10.1115/FEDSM2009-78397
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