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Old   July 22, 2007, 04:23
Default Hello all, does anyone of you
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tutlhino
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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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Old   July 25, 2007, 05:35
Default Does anyone know if I'm right
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tutlhino
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Does anyone know if I'm right with my assumption, or is different?

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Florian
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Old   July 25, 2007, 12:18
Default GAMG can be used for both symm
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Eugene de Villiers
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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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Old   September 20, 2007, 04:53
Default Hi Eugene, So what would y
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pvc
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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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Old   September 20, 2007, 05:53
Default For asymmetric matrices I gene
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Eugene de Villiers
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For asymmetric matrices I generally use the smoothSolver with GaussSeidel smoother.
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Old   January 26, 2013, 16:01
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Ehsan
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any information about GAMG solver and its coefficients?
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