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June 11, 2002, 11:22 |
BICGSTAB, MINRES, GMRES, ORTHOMIN???
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#1 |
Guest
Posts: n/a
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Hi,
just a little question; for a stokes solver, In almost all the bibliographical FEM articles, I have seen that is mentioned always the GMRES and the BICGSTAB methods as solvers, but in another book I had found the algorithms Orthomin and Orthores, which I did not know them very well, but its algorithms are easy to implement. Someone can tell me if they are a good alternative to the previous ones, and if they work for not non-symmetric problems? Thank you very much, Carlos |
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June 12, 2002, 19:52 |
Re: BICGSTAB, MINRES, GMRES, ORTHOMIN???
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#2 |
Guest
Posts: n/a
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A good rule of thumb that I used:
1) Symmetric system with a dominant diagonal: conjugate gradient or orthomin2 2) Non-Symmetric system with a dominant diagonal: orthomin2 3) else: gmres For the code I wrote when completing me thesis, I always used that rule and it never fails. ( I must be lucky...) |
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