[chnrdu]

I'd like to using OpenFOAM with polyhedra mesh to simulate a flow field in a pipe connected volume, like the image:

I use salome to generate this mesh with netgen(1d-2d-3d)

I have set up the boundaries as independent as each surface is a boundary, then convert it to polyhedra using polyDualMesh, but checkMesh said that there are several concave faces and wrong oriented faces:



the black colored faces is concave faces which are just around the connection edge of the two near boundaries.

However, I set some surfaces together as one boundaries including the neighbor surfaces with concave angle. I can converted it to polyhedra without errors, but the original edge between the concave surfaces becomes to several faces with polygon, so it loses the geometry information.



My problem is: how to convert tetra to polymesh avoiding concave faces without losing geometric infomation like such volume?

Thank you in advance.

Martin/Run Du