Neighboring cells in TETRA_4 unstructured grids

Amaresh Dalal

Hi All,

We are obtaining tetrahedron unstructured grids from a gridgeneration software and we are using the grid data in CGNS format to solve the NS equations by the finite volume method.

In our solver, we need to know the neighboring elements sharing each face. For example, a tetrahedron element has four neighbors. CGNS does not give this information. Then how do we obtain the neighboring element sharing the face in an efficient way?

Any help will be much appreciated.

Thanking you,

Amaresh Dalal