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-   -   CG or AMG Solver (http://www.cfd-online.com/Forums/cd-adapco/56494-cg-amg-solver.html)

norbinou March 6, 2008 02:54

CG or AMG Solver
 
What is the best solver in Star-CD for incompressible, steady state model?

Is their any information about that?

Thanks

Norbinou

Sachin Patil March 6, 2008 03:13

Re: CG or AMG Solver
 
Hi

To the best of my knowledge , there is as such no information on which solver has to be used. I will prefer AMG solver as it has some advatages over CG. Actually you can use both solvers alternately and then see the difference in results (in my case I got exactly the same answers)

Sachin

Anton Lyaskin March 6, 2008 04:29

Re: CG or AMG Solver
 
In brief - AMG is much faster for big problems (like 1 million cells and bigger) but requires more memory.

matej March 12, 2008 08:07

Re: CG or AMG Solver
 
I would add that your result should be the same whatever solver you use. Otherwise the whole CFD would be pretty useless. Good comparison over different solvers could be found in: http://www.amazon.com/Computational-.../dp/3540420746

matej


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