Learning Forum

[Marius Carrier]

Dear Ansys Team,

I have two surfaces. On the bottom side the surface has values which are above the recommended values for the Near-Wall Model. On the top, I do have the necessary y+ values for the Near-Wall Model. Is Fluent using the Near-Wall Model when possible, or is it always using the same model?

Kind regards and thank you for your help.

Marius

[Rob]

It will use the same model for all walls. 

[Marius Carrier]

 

But if I haven't chosen a wall function, will it just use the Near-Wall Model, even if the y+ values are too high?

 

[Rob]

Which turbulence model are you using? 

[Marius Carrier]

k-omega-SST

[Rob]

If the near wall mesh is too coarse you'll just revert towards the far field turbulence values so you'll lose near wall accuracy. Check the manuals and Learning on here for a better explanation.