Conclusions

• The Support Operator Methodology has been extended to 3-D Unstructured Hexahedral Meshes.
• For standard preconditioners, solution times for SO are slightly better than MH.
• For the specialized low-order preconditioners, solution times for SO are slightly worse than MH.
• Vanilla AMG works much better on MH than SO.
• Both methods provide second-order accurate solutions.

Future Work:

Parallel versions of Augustus and Spartan (a multi-group SP_N package) are being developed.