SST (Menter’s Shear Stress Transport)

SST (Menter’s Shear Stress Transport) turbulence model is a widely used and robust two-equation eddy-viscosity turbulence model used in Computational Fluid Dynamics. The model combines the k-omega turbulence model and K-epsilon turbulence model such that the k-omega is used in the inner region of the boundary layer and switches to the k-epsilon in the free shear flow.

History

The SST two equation turbulence model was introduced in 1994 by F.R. Menter to deal with the strong freestream sensitivity of the k-omega turbulence model and improve the predictions of adverse pressure gradients. The formulation of the SST model is based on physical experiments and attempts to predict solutions to typical engineering problems. Over the last two decades the model has been altered to more accurately reflect certain flow conditions. The Reynold's Averaged Eddy-viscosity is a pseudo-force and not physically present in the system. The two variables calculated are usually interpreted so k is the turbulence kinetic energy and omega is the rate of dissipation of the eddies.

SST (Menter’s Shear Stress Transport) turbulence model [1]

Variable Definition

Constants

K-W Closure

, ,

K-e Closure

, ,

SST Closure Constants

Boundary and Far Field Conditions

Far Field

Boundary/Wall Conditions

References

  1. Menter, F. R. (August 1994), "Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications", AIAA Journal, 32 (8): 1598–1605, Bibcode:1994AIAAJ..32.1598M, doi:10.2514/3.12149

Notes

This article is issued from Wikipedia - version of the 4/27/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.