[chriss85]

I've exported an stl file from a CAD program and snappyHexMesh has problems because there are seams between the different patches. Using Salome, I can use Repair->Sewing in the Geometry module to fix this. Unfortunately this results in the patches being combined so I lose the ability to specify boundary conditions later on. As the geometry is quite complex I don't want to manually piece the polygons together afterwards. Does anyone know of a method or tool that can do sewing while preserving the single patches?

Edit: Alternatively, is it sufficient to increase the precision until the seams become small enough?

Edit: Next idea, is it possible to use topoSet in combination with the old surfaces to split the patches again? I would guess that a few cells at the boundary might be wrong then, but maybe this could be a way?