turbulence wall law on unstructred mesh
 

I'm developing a code computing 3D compressible turbulence flow on unstructured mesh.

I don't want to make many hexahedrons near the wall, for this method requires enormous computing. I want to implement wall law on tetrahedron mesh.

I know I must calculate y+ and u+ of the near wall Control Volume(CV), and then according the y+, use different function calculate turbulence viscidity.

But which CV should I calculate? Some CV have a face on the wall, some have a edge on the wall, and some have a vertex on the wall.

How to calculate the turbulence stress resulted from the wall, k and e in the near wall CV? Should I integrate in a tetrahedron?

Re: turbulence wall law on unstructred mesh
 

That's why most codes use prisms at the wall.

Re: turbulence wall law on unstructred mesh
 

I see.

But how can I generate prisms at the wall? can Gambit or gridgen do it?

If I have to progame to implement it, where can I find some article about it?

Thanks

Re: turbulence wall law on unstructred mesh
 

Gambit can do it, definitely.

Astrid

Re: prism grid generation
 

Gridgen can generate layers of prism cells as well.