
This section describes the theory behind the Standard and SST  model. For details about using the models in ANSYS FLUENT, see this chapter and this section in the separate User's Guide.
This section presents the standard [ 379] and shearstress transport (SST) [ 224]  models. Both models have similar forms, with transport equations for and . The major ways in which the SST model [ 225] differs from the standard model are as follows:
The transport equations, methods of calculating turbulent viscosity, and methods of calculating model constants and other terms are presented separately for each model.