HexMesh

Hi all together,

I am using Salome for over one year now and now I have a question
Well I make simple geometry meshing with salome for using them in OpenFOAM.
Usually I export the mesh to the *.unv mesh file type and everything works very fine.


So now my question is.
How can I manage it to create separate hexMesh regions without errors ? 

example (picture):

the picture shows my recent geometry.
I wanna mesh the inside (quad) with 4 cells and the ogrid around with more cells ...
If I compute it now i get errors:

Unexpected geometry
Invalid input ...

Is it possible in gernal to build such a mesh!?
Tobi

Well additional info for clearness,

i can make the ogrid very fine but if I do that, I get extrem fine cells in the middle of the geometry and that is not what I want.
Just 2 - 4 cells in the geometry center and at the o grid may be 50.
Hope its clear what I mean

Hi Tobi,

So you want to get 4 polyhedrons in the center, am I right?

St.Michael

Yes you `re right.
I just wanna have 4 polyhedrons in the center.

Previously Saint Michael wrote:

Hi Tobi,

So you want to get 4 polyhedrons in the center, am I right?

St.Michael

 

Hi Tobi,

after computing the rest mesh, you can manually create 4 polygons at the center bottom and extrude them into polyhedrons. Then you also need to merge equal nodes and elements.

Note that UNV format doesn't support polygons and polyhedrons.

St.Michael