Summary

• The Support Operator Methodology has been extended to 3-D Unstructured Hexahedral Meshes.
• It has a local stencil, with both cell-centered and face-centered unknowns.
• It is conservative and material discontinuities are treated rigorously.
• It generates a symmetric positive definite matrix.
• It is second-order accurate.
• It reduces to the standard differencing scheme if the mesh is orthogonal.