12.11.3 Setting Up the SST $k$- $\omega$ DES Model

For the SST $k$- $\omega$ sub-model, the model-specific options that you can select are

• delayed DES (Section  12.13.4)

• viscous heating (always activated for the density-based solvers) (Section  12.13.1)

• low-Re corrections $k$- $\omega$ option (Section  12.13.7)

• SST functions, F1 and F2 (Section  12.13.20)

The model constant $C_{\rm des}$ is set to 0.61 for the SST $k$- $\omega$ RANS model (see this section in the separate Theory Guide).

Figure 12.11.3: The Viscous Model Dialog Box Displaying the SST $k$- $\omega$ Detached Eddy Simulation Model Options

Additionally, you can perform the following DES-specific functions by using the
/define/models/viscous/detached-eddy-simulation? text command:

• Use cell volume-based LES length scale (default is to use maximum cell edge)

• Modify only the length scales that appear in the destruction term in $\nu_t$ equation (the default is to modify all length scales within the $\nu_t$ equation)