Boundary Layer without using Cooper scheme
 

Dear all,
does anybody know, whether it’s possible to create a boundary layer at the inner wall of a geometry, if I am not using the Cooper scheme to create my volume mesh? My problem is: I want to mesh the geometry of a vessel having a bifurcation. At this I want to create a boundary layer of hexahedral elements, because I need a good spatial resolution close to the wall. Afterwards I would like to fill up the rest of the geometry with tetrahedral or unstructured hexahedral elements. Unfortunately gambit refuses to mesh the surface via “Quad Map” or “Quad Submap” and due to the bifurcation I cannot use the Cooper scheme. Does anybody have an idea how I can get such a hexahedral boundary layer by using Gambit or Tgrid?
Thanks a million,
Lilly

you can mesh your surface with tri, and your BL will be made of wedges.

just tets in volume
 

Thank you for your help!
I tried to do so, but unfortunately the Boundary Layer only exists on the surface and the volume is filled up just with tets in this case...
Do you have any idea what I did wrong?
Thanks a million,
Lilly

post pictures

pics
 

I attached two pics that I shot in the "Examine Mesh" mode.

Thank you!
Lilly

where did you apply the BL?

I see:I have to attach the Boundary Layer to the wall (face) of the geometry and not to the inlet and outlet edge.
It's working perfect now.
Thanks a million for your help, mAx!