[guy_smiling]

I'm trying to use blockMesh (and create a blockMeshDict file) with keywords other than "hex". There seems to be conflicting documentation: in http://www.openfoam.com/docs/user/blockMesh.php I see that I need to have 8 vertices, and all blocks are inherently hexahedral; in order to make a prism I need to collapse two vertices, and still use hex.

However, here http://www.openfoam.com/docs/user/mesh-description.php apparently I can use any of these keywords listed (such as prism) to generate a prism with only 6 vertices. I have found that the keyword prism in blockMeshDict still gives me 8 vertices (two of which are garbage) or 7 (one of which is garbage) if I order the vertices in a wrong way.

Is there some way to get a different geometry besides hex in blockMesh? Does anyone know how to use blockMesh without just hex?