Wall boundary conditions for the automatic wall treatment function for K-omega models
 

Hi,

I would like to know which Wall type boundary conditions do I need to set for velocity, temperature, tke and omega when using the automatic wall treatment function for K-omega models, more specifically the automatic wall function with Wilcox's low Re corrections.

Thanks

What application is this? Could you please give some details?

Hi Chaitanya,

Flow through the inside of a rotating cavity with small fins on the wall perifery for cooling enhancement.

The fin size and gap between fins force me to refine the mesh enough so I can have enough elements to resolve the flow though the gaps. This leads to y+ numbers at the wall lower than 30 where the law of the wall is not applicable giving me wrong heat transfer numbers.

From what I know, the automatic wall treatment function available with the k-omega models is apropriate for my problem with an appropriate range for y+ between 3 and 300.

I don't have enough computational resources to refine the mesh enough at the wall so I could use a no-slip boundary condition.

I don't find in the manual how to properly set the boundary conditions in the boundary.in in order for converge to use the automatic wall treatment.

Thanks

You could specify the option of automatic wall function in Studio under Turbulence Modeling --> Near Wall Treatment --> Automatic wall function. Also, for the given wall you could use law of the wall option for velocity/temperature and wall model for omega. Please let me know if this helps.