|October 1, 2013, 03:49||
Join Date: May 2009
Location: Delft, Netherlands
Posts: 1,135Rep Power: 20
The first three solvers should always outperform smoothSolver. GAMG should outperform CG methods when not limited by communication (this is especially true for the pressure equation). If you're in doubt, just run a couple fixed timesteps with each of the solvers and you will very quickly find out where you can save time.
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|October 1, 2013, 04:19||
Join Date: Sep 2013
Posts: 8Rep Power: 4
As akidess already said, for p a good choice should be GAMG, for other fields I usually use PBiCG.
BICCG shouldn't be used any more:
|October 7, 2013, 08:47||
Join Date: Jan 2010
Location: CFD Lab
Posts: 118Rep Power: 8
Have a look at the following references for more details:
P. K. Khosla, and S. G. Rubin, “A diagonally dominant second-order accurate implicit scheme”, Computers and Fluids, 2:207-209, 1974.
M. R. Hestens, and E. L. Steifel, “Method of conjugate gradients for solving
linear systems”, Journal of Research, 29:409-436, 1952.
D. A. H. Jacobs, “Preconditioned Conjugate Gradient methods for solving
systems of algebraic equations”, Central Electricity Research Laboratories
Report, RD/L/N193/80, 1980.
H. A. Van Der Vorst, “Bi-CGSTAB: A fast and smoothly converging variant of Bi-CG for the solution of nonsymmetric linear systems”, SIAM J. Scientific Computing, 13(2):631-644, 1992.
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