Mesh Changing When Importing from Fluent
 

Hi everybody,

I am running into an issue with importing a mesh from Fluent into Openfoam where quadrilateral cells are getting changed into prisms instead of hex cells. I have attached three pictures that show the mesh in fluent, halfway through the process, and after I finish importing it to the correct format in OpenFOAM.

Here is an overview of my process. This mesh is for a FSI code, so I need to have faceSet and corresponding faceZone on the edge of my '2D' mesh.

1. I make the mesh in Fluent and export it as a .msh file, in ASCII format.
2. I import the mesh with FluentMeshToFoam
3. I export the mesh with FoamMeshToFluent to preserve the mesh and get a third dimension.
4. I import the exported mesh with Fluent3DMeshToFoam

Does anyone know why the fourth step would change my mesh from a nice Quad/hex dominant mesh to a mesh dominated by prisms? Is there anything I can do to post process this mesh and get it back to uniformly quad/hex?

Thanks!