Results 11 to 20 of about 50 (50)
Extension of the k-omega-SST turbulence model for flows over rough surfaces [PDF]
22nd Atmospheric Flight Mechanics Conference, 1997 This paper introduces an improved computational method for predicting the behaviour of turbulent flows over rough surfaces. The method is based on the numerical solution of the Navier-Stokes equations employing the k - w-SST turbulence model. An existing surface-roughness method, developed for the traditional k — w models, was found to not work well ...
Antti Hellsten +3 more
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Evaluation of Different k-omega and k-epsilon Turbulence Models in a New Curvilinear Formulation [PDF]
17th AIAA Computational Fluid Dynamics Conference, 2005 Despite significant progress in unstructured grid generation and employment, the robust employment of body-conforming coordinate systems promotes the workers to consider it as a major alternative to treat relatively complex flow fields in irregular geometries.
Gerry E. Schneider +2 more
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Formulation of the k-omega Turbulence Model Revisited [PDF]
45th AIAA Aerospace Sciences Meeting and Exhibit, 2007 This paper presents a reformulated version of the author'sk-ω model of turbulence. Revisions include the addition of just one new closure coefficient and an adjustment to the dependence of eddy viscosity on turbulence properties. The result is a significantly improved model that applies to both boundary layers and free shear flows and that has very ...
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Curvature and Rotation Sensitive Variants of the K-Omega SST Turbulence Model
Volume 1: Symposia, Parts A, B and C, 2009The 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 ...
D. Keith Walters, Tej P. Dhakal
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Modification to the k-Omega Turbulence Model for Vortically Dominated Flows [PDF]
49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2011 [Abstract] Vortically dominated flows (wingtip, vortex-fin interaction, jet into cross-flow) have traditionally been difficult to accurately model using two-equation RANS (Reynolds Averaged NavierStokes) CFD tools. However RANS models provide the “workhorse” for many aerodynamic simulations.
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Stress Limiter Consideration for k-omega Turbulence Models in Shock-Wave/Turbulent Boundary-Layer Interactions in Supersonic and Hypersonic Flows [PDF]
20th AIAA Computational Fluid Dynamics Conference, 2011 The shear stress transport (SST) turbulence model of Menter was proposed to predict an accurate separated flow in the adverse pressure gradient flows, but it has sometimes failed to predict the flowfield with strong shock wave/turbulent boundary-layer interaction. In an effort to improve the original k-ω model, Wilcox has recently proposed a modified k-
Jie Tan, Jie Jin
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Staggered upwind method for solving Navier-Stokes and k-omega turbulence model equations
AIAA Journal, 1995A staggered finite volume upwind algorithm for solving the compressible Navier-Stokes equations and the k-w turbulence model equations has been developed for computing cascade flows. Roe's upwind scheme is used to discretize the convective terms of the Navier-Stokes equations and a third-order upwind scheme is used for the convective terms of the k-ω ...
Xiaoqing Zheng, Feng Liu
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Staggered finite volume scheme for solving cascade flow with a k-omega turbulence model
AIAA Journal, 1994A k-ω turbulence model by Wilcox is applied to cascade flow calculations. A staggered finite volume scheme is proposed to solve the compressible Reynolds-averaged Navier-Stokes equations and the k-ω equations are solved on staggered control volumes with k and ω defined at the cell vertices of the original grid.
Xiaoqing Zheng, Fieng Liu
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Influence of freestream values on k-omega turbulence model predictions
AIAA Journal, 1992The Wilcox (1988, 1991) k-omega model for eddy-viscosity turbulence does not require damping functions in the viscous sublayer, and its equations are less stiff near the wall. It has been designed to predict the requisite wake length in equilibrium, adverse pressure-gradient boundary-layer flows.
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Fluid Dynamics Conference, 1995
The two-equation k 0 turbulence inodcl tluc to Wilcox has been iinpleinented in OVERFLOW Uiiii-1;iyer Navier-Stokes code. Both high and low Reynolds iiuinbcr forms of the model including compressibility corrections were considered. The near-wall consistency and accura~cy of the high and low Reynolds number fonns of the model for boundary layers has ...
D Wilcox, M Kandula
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The two-equation k 0 turbulence inodcl tluc to Wilcox has been iinpleinented in OVERFLOW Uiiii-1;iyer Navier-Stokes code. Both high and low Reynolds iiuinbcr forms of the model including compressibility corrections were considered. The near-wall consistency and accura~cy of the high and low Reynolds number fonns of the model for boundary layers has ...
D Wilcox, M Kandula
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