KOmegaSST and KLAxell Turbulence Models in AMR-Wind

[hamidMech]

Hello,
I have a few questions regarding the turbulence models "KOmegaSST" and "KLAxell" in AMR-Wind:
1- Are these models implemented as RANS (steady) or URANS (unsteady) formulations in AMR-Wind?
2- Which turbine models are compatible with each of these turbulence models? For example, can they be used with TurbineFastDisk, TurbineFastLine, or other turbine modeling approaches?
3- Can these turbulence models be used in simulations involving stable, unstable, and neutral atmospheric stratification conditions?
Thanks you in advance.
Best regards,
Hamid

[hgopalan]

AMR-Wind runs only in unsteady mode so we have only URANS models. The KOmegaSST model does not have wall function and you need to resolve the viscous layer. It also does not have full ABL support and resolves only the surface layer. If you want to run ABL URANS, use the KLAxell model.

The KLAxell model can be run for any ABL stratification and can be used with any turbine parametrisation. However, I have tested it only with UniformCT and Joukowsky disc.