A new scalar eddy-viscosity turbulence model is proposed, designed to exhibit physically correct responses to flow transition, streamline curvature, and system rotation effects. The eddy-viscosity model (EVM) developed herein is based on the k–ω framework and employs four transport equations. The transport equation for a structural variable (v2) from a curvature-sensitive Shear Stress Transport (SST) k–ω–v2 model, analogous to the transverse turbulent velocity scale, is added to the three-equation transition-sensitive k–kL–ω model. The physical effects of rotation and curvature (RC) enter the model through the added transport equation. The new model is implemented into a commercial computational fluid dynamics (CFD) solver and is tested on a number of flow problems involving flow transition and streamline curvature effects. The results obtained from the test cases presented here are compared with available experimental data and several other Reynolds-Averaged Navier-Stokes (RANS) based turbulence models. For the cases tested, the new model successfully resolves both flow transition and streamline curvature effects with reasonable engineering accuracy, for only a small increase in computational cost. The results suggest that the model has potential as a practical tool for the prediction of flow transition and curvature effects over blunt bodies.
Sensitization of a Transition-Sensitive Linear Eddy-Viscosity Model to Rotation and Curvature Effects
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received September 19, 2013; final manuscript received September 17, 2014; published online January 14, 2015. Assoc. Editor: Sharath S. Girimaji.
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Chitta, V., Dhakal, T. P., and Keith Walters, D. (March 1, 2015). "Sensitization of a Transition-Sensitive Linear Eddy-Viscosity Model to Rotation and Curvature Effects." ASME. J. Fluids Eng. March 2015; 137(3): 031207. https://doi.org/10.1115/1.4028627
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