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-   -   Divergence detected when using parallel solver (http://www.cfd-online.com/Forums/fluent/48120-divergence-detected-when-using-parallel-solver.html)

Phil May 2, 2008 08:07

Divergence detected when using parallel solver
 
Hi all,

I'm having a problem when using the parallel solver where the solution stops and it says divergence detected.

The issue is that when running the EXACT same set of iterations on the serial solver, no divergence occurs and the solution converges very well. Also when divergence is detected, the residuals indicate that the solution is converging normally. For the parallel computation I'm using 4 processors.

Does anyone have any ideas? Any help is very much appreciated.

Thanks Phil

cfd_newbie May 2, 2008 09:55

Re: Divergence detected when using parallel solver
 
Try to run the solver for two iteration (time steps) on the serial solver, save the case and data file. Then restart the solver in parallel mode read the previously saved case and data file ... and run your solution.

If this was helpful let me know.


Phil May 2, 2008 11:00

Re: Divergence detected when using parallel solver
 
Thanks for replying mate but I'm solving it steady state. Strangely its when I put the relaxation factors down that it diverges.

Any ideas?

Aris Nikolopoulos May 9, 2008 08:17

Re: Divergence detected when using parallel solver
 
Any UDFs? Particles involved? What release are you using?


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