failed to snap to a symmetry boundary condition patch
 

I have a model with a geometry like a 3D wedge. The two sides of the wedge use symmetry boundary condition. I use snappyHexMesh to mesh the wedge with background mesh of a block mesh. All cellls are cubic. The wedge circular end was snapped well but not the two sides. For the two sides, it basically did nothing. I changed the boundary conditions of the two sides to type wall. It snapped perfectly. Anyone has this experience? Any help?

Hi Charles,

did you find a solution? I'm facing the same issue where shm fails to snap to a symmetry plan not parallel to the main planes. In my case there is a 120 degree section, see attachment. Changing it to wall type shows no problem for the snapping

Marco

Pragmatic solution: mesh it with "wall" and just change the type back to symmetric in the boundary file once meshing is complete. Obviously you need to work in ASCII.

Yes, I should have updated the solution. snappyHexMesh does not snap "symmetry" patch. It snaps "wall" patch. The solution is as AtoHM said.
1. define the "symmetry" patch type "wall"
2. After generating mesh, edit file boundary in folder constant/polyMesh and change the patch type "wall" back to "symmetry"

Thanks guys! Though a little hard to understand why shm doesnt snap to it...