Re: Testing matrix solvers (fem)

I'm developing some sparse matrix solvers (iterative) for FEM
applications, and hence need some robust way to compare the accuracies
of different solver and preconditioner types. There must be a a free
collection of _unassembled_ elemental matrices with right-hand sides
and solutions. Preferably resulting in large and sparse _unsymmetric_
stiffness matrices. I checked the Harwell-Boeing collection, but there
were no suitable cases, only symmetric. Does anyone have experience
with such a thing?

You can have a look at Oberwolfach benchmark collection. Well, most
matrices are symmetric though.

http://www.imtek.uni-freiburg.de/simulation/benchmark/

Yet, you can find here really huge matrices from the bone models. If
you like challenges, try this

http://www.imtek.uni-freiburg.de/simulation/benchmark/wb/bone/

If you know someone with ANSYS nearby, ask him generate for you model
you like and then use MOR for ANSYS to dump matrices.

Best wishes,

Evgenii

http://ModelReduction.com/

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