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July 22, 2007, 05:23 |
Hello all,
does anyone of you
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#1 |
Guest
Posts: n/a
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Hello all,
does anyone of you know more about the GAMG Solver which is used in openFOAM 1.4, or know a paper where this multigrid method is proposed? Unfortunately I didn't find anything about it. In of1.3 just an AMG was offered for symmetric matrices, does the GAMG mean now that it is a mixture and the geometric mg is used for asymmetric matrices, where AMG is still used for symmetric matrices? Cheers Florian |
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July 25, 2007, 06:35 |
Does anyone know if I'm right
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#2 |
Guest
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Does anyone know if I'm right with my assumption, or is different?
Cheers Florian |
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July 25, 2007, 13:18 |
GAMG can be used for both symm
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#3 |
Senior Member
Eugene de Villiers
Join Date: Mar 2009
Posts: 725
Rep Power: 21 |
GAMG can be used for both symmetric and asymetric matrices, and is basically an upgrade for the old AMG. However, it is not very cost effective to use GAMG for asymmetric matrices at present.
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September 20, 2007, 05:53 |
Hi Eugene,
So what would y
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#4 |
Guest
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Hi Eugene,
So what would you advise for a preconditioner instead of PCG and GAMG for asymetric matrices? Rgds Pvc |
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September 20, 2007, 06:53 |
For asymmetric matrices I gene
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#5 |
Senior Member
Eugene de Villiers
Join Date: Mar 2009
Posts: 725
Rep Power: 21 |
For asymmetric matrices I generally use the smoothSolver with GaussSeidel smoother.
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January 26, 2013, 17:01 |
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#6 |
Senior Member
Ehsan
Join Date: Oct 2012
Location: Iran
Posts: 2,208
Rep Power: 27 |
any information about GAMG solver and its coefficients?
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