The hybrid RANS-LES models Shielded Detached Eddy Simulation (SDES) and Stress-Blended Eddy Simulation (SBES), which have both an improved shielding function compared to DDES / IDDES, are a released functionality only for some turbulence models based on the ω-equation and the Realizable k-ε turbulence model with scalable wall functions or enhanced wall treatment. The following combinations with k-ε turbulence models are available as beta functionality:
Standard k-ε model with all near wall treatments
RNG k-ε model with all near wall treatments
Realizable k-ε model with all near wall treatments other than scalable wall functions or enhanced wall treatment
Both models are available for transient cases with (k,ε)-turbulence models after enabling beta feature access, as described in Introduction.
They can be accessed in the Viscous Model dialog box in the Scale-Resolving Simulation Options group box.
The corresponding TUI command to enable the SBES/SDES model is:
/define/models/viscous/turbulence-expert/turb-add-sbes-sdes? yes
The Hybrid Model option can be specified using:
/define/models/viscous/turbulence-expert/sbes-sdes-hybrid-model
For SBES in addition a Subgrid-Scale Model can be chosen by:
/define/models/viscous/turbulence-expert/sbes-sgs-option