Modications and Clarications for the Implementation of the Spalart-Allmaras Turbulence Model. Allmaras, S., R., Johnson, F., T., & Spalart, P., R. In pages 9-13, 2012. Seventh International Conference on Computational Fluid Dynamics.
Modications and Clarications for the Implementation of the Spalart-Allmaras Turbulence Model [pdf]Paper  abstract   bibtex   
We present modications to the Spalart-Allmaras (S-A) turbulence model targeted toward situations of under-resolved grids and unphysical transient states. These modications are formulated to be passive to the original model in well resolved owelds and should produce negligible dierences in most cases. They are motivated primarily by numerical issues near the interface between turbulent and irrotational regions. We also comment on the appropriate form of S-A for compressible ows, the inclusion of the laminar suppression term for fully turbulent ows, and the use of maximum value limiters on the turbulence solution. We also present a new analytic solution to S-A for law of the wall velocity.

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