|October 1, 2013, 03:49||
Join Date: May 2009
Location: Delft, Netherlands
Posts: 1,176Rep 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.
*On twitter @akidTwit
*Spend as much time formulating your questions as you expect people to spend on their answer.
|October 1, 2013, 04:19||
Join Date: Sep 2013
Posts: 8Rep Power: 5
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.
“If you have an apple and I have an apple and we exchange these apples then you and I will still each have one apple. But if you have an idea and I have an idea and we exchange these ideas, then each of us will have two ideas.”
|Thread||Thread Starter||Forum||Replies||Last Post|
|numeric schemes||Tobi||OpenFOAM Running, Solving & CFD||0||August 13, 2012 08:00|
|Better organization of Convective Term approximation schemes||Michail||CFD-Wiki||0||March 15, 2012 13:56|
|time stepping schemes for compressible DNS/LES||shyamdsundar||Main CFD Forum||0||January 15, 2010 00:15|
|ENERGY CONSERVATION SCHEMES!||Science Seeker||Main CFD Forum||1||May 24, 2001 12:13|
|Higher-order bounded convection schemes for pure advection with discontinuity||Anthony||Main CFD Forum||3||June 13, 1999 02:36|