A Closed-form Correction for the Spalart-Allmaras Turbulence model for Separated Flows

A one-equation model previously tested for parabolic flows and 2-D separated flows was implemented for rotating flows. Flows in rotor-stator disk systems, and in sealed cavities between contrarotating and corotating disks, were calculated and compared with known experimental and numerical data. For buoyancy-driven flow in a rotating cavity, an analytic solution for the turbulent regime was obtained. [S0098-2202(00)01302-X]

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Analysis of an RNG based turbulence model for separated flows

International Journal of Engineering Science ◽

10.1016/0020-7225(92)90148-a ◽

1992 ◽

Vol 30 (10) ◽

pp. 1379-IN4 ◽

Cited By ~ 109

Author(s):

C.G. Speziale ◽

S. Thangam

Keyword(s):

Turbulence Model ◽

Separated Flows

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Simulation of separated flows on the base of differential turbulence model

10.2514/6.1997-1861 ◽

1997 ◽

Cited By ~ 1

Author(s):

D. Ivanov ◽

A. Obabko ◽

I. Yegorov ◽

D. Ivanov ◽

A. Obabko ◽

...

Keyword(s):

Turbulence Model ◽

Separated Flows

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The Application of a Recursion RNG-Based Turbulence Model for Separated Flows

Transition, Turbulence and Combustion - ICASE/LaRC Interdisciplinary Series in Science and Engineering ◽

10.1007/978-94-011-1034-1_16 ◽

1994 ◽

pp. 167-178

Author(s):

Siva Thangam ◽

Ye Zhou ◽

George Vahala

Keyword(s):

Turbulence Model ◽

Separated Flows

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On Turbulent Flows Dominated by Curvature Effects

Journal of Fluids Engineering ◽

10.1115/1.2909999 ◽

1992 ◽

Vol 114 (1) ◽

pp. 52-57 ◽

Cited By ~ 24

Author(s):

G. C. Cheng ◽

S. Farokhi

Keyword(s):

Turbulent Flows ◽

Turbulence Model ◽

Dominant Role ◽

Longitudinal Velocity ◽

Turbulence Models ◽

Separated Flows ◽

Local Curvature ◽

Streamline Curvature ◽

Curvature Effects ◽

Numerical Predictions

A technique for improving the numerical predictions of turbulent flows with the effect of streamline curvature is developed. Separated flows and the flow in a curved duct are examples of flow fields where streamline curvature plays a dominant role. New algebraic formulations for the eddy viscosity μt incorporating the k–ε turbulence model are proposed to account for various effects of streamline curvature. The loci of flow reversal (where axial velocities change signs) of the separated flows over various backward-facing steps are employed to test the capability of the proposed turbulence model in capturing the effect of local curvature. The inclusion of the effect of longitudinal curvature in the proposed turbulence model is validated by predicting the distributions of the longitudinal velocity and the static pressure in an S-bend duct and in 180 deg turn-around ducts. The numerical predictions of different curvature effects by the proposed turbulence models are also reported.

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