For details about using the model in Ansys Fluent, see Modeling Turbulence and Setting up the Generalized k-ω (GEKO) Model in the User's Guide.

Within the RANS concept, it is not possible to cover all flows with sufficient accuracy using a single model. Therefore, it is necessary that industrial CFD codes offer a multitude of turbulence models, allowing users to select the best model for their application. However, this is not an optimal strategy, as not all models are of the same quality (in terms of robustness, interoperability with other models, near wall treatment). Switching from one model to another has therefore additional consequences beyond the desired change in the solution. An alternative approach is to offer a single model with enough flexibility to cover a wide range of applications.

The goal of the GEKO model is to consolidate the two-equation models into such a formulation. The model provides free parameters that you can adjust for specific types of applications, without negative impact on the basic calibration of the model. This is different from classical models, where the coefficients of the model are provided (for example, and in models [340]) but can hardly be changed because they are inherently intertwined and any change would typically lead to a loss of calibration with the most basic flows like a flat plate boundary layer.