[bruce21]

Hi CFD community,

I am using snappyHexMesh to refine my axisymmetric mesh (which uses a wedge boundary condition). I created this wedge domain using Gmsh. When I try refining the mesh, I see that the wedge boundaries lose their planarity. I see this is because snappy is refining the mesh in Y axis (around the axis of symmetry) also. Please see the attached dictionary file.

I need to refine the mesh only in X and Z direction, but not Y. I realized that refineMesh can do this, but the resulting mesh isn't satisfactory.

So, is there a way to specify directionality (refine only in specified axis) while using snappyHex for refinement?

Thanks in advance!

[LuckyTran]

Not in snappy, no. Snappy is not a mesher, it is a tool that makes a mesh snappy. Snappy is also not a tool for refining a mesh.

Is your domain a simple wedge? If so, return to the original blockMesh, you don't need snappy. If you have a wedge with a car inside it then:

Two other ideas you may like to try
1) Increase the resolution in the X and Z direction in the original blockMesh. Then snap it.
2) Scale the mesh in the Y direction smaller. Run snappy. Then scale the Y-dimension back up.

[AtoHM]

The ESI version of snappyHexMesh does support directional refinement.