[Arnoldinho]

Hi all,

I cannot get really familiar with the implementations of the Spalart Allmaras model for nut, which can be, as read from many posts, be seen as a continuous wall function for nut.

Basically, there are two versions available:
- nutSpalartAllmarasWallFunction
- nutSpalartAllmarasStandardWallFuntion

As far as I can see, they differ in the way U as the controlling variable is calculated; the latter version with a differentiation of yPlus/yPlusLam and the first one with a more complex calculation of Utau.

Can anyone explain the actual difference and the applications they have been thought for, esp. regarding continuous low- to high-re modeling?

Arne

[bastil]

Originally Posted by Arnoldinho

Can anyone explain the actual difference and the applications they have been thought for, esp. regarding continuous low- to high-re modeling?

Arne, as far as I know the first one (nutSpalartAllmarasWallFunction) is designed to be the continuous low- to high-re wall funtion whereas the second one (nutSpalartAllmarasStandardWallFunction) is a Hi-Re formulation. Please correct me if I'm wrong.

Regards Bastian

[Arnoldinho]

Hi Bastil,

thanks for your answer. Unfortunately I cannot correct you in what you stated . I always used nutSpalartAllmaras (without 'standard') so I haven't yet checked the differences in results.

Arne