Turbulence Modeling Verification and Validation (Invited)

Turbulence modeling for the Reynolds-averaged Navier-Stokes (RANS) equations includes many assumptions and simplifying closures. Numerous models have been developed over the years, and all are deficient in one way or another. Many collective efforts have attempted to validate turbulence models for a wide range of problems, but conclusions have often been muddied due to the lack of grid convergence, lack of model verification in different codes, or for other reasons. In this paper, turbulence modeling verification and validation is discussed primarily within the context of several recent workshops. A web-based turbulence modeling resource is also described, whose goals include turbulence model documentation, verification, and validation. Using this resource, specific models can easily be put through a verification testing procedure, helping to eliminate coding errors.