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-   -   amg divergence after 3500 iterations (http://www.cfd-online.com/Forums/fluent/49130-amg-divergence-after-3500-iterations.html)

joh August 29, 2008 11:15

amg divergence after 3500 iterations
 
hi all,

i am trying to model a wing between two walls. the case starts fine but after 3500 i get ang divergence: pressure correction.

any recommendations please?


dive August 29, 2008 19:23

Re: amg divergence after 3500 iterations
 
refine ur grid or use PRESTO option for pressure interpolation.

joh August 31, 2008 06:26

Re: amg divergence after 3500 iterations
 
thanks for the help. i tried changing pressure cycle to FLEXIBLE and it has helped and the case does not diverge. but the continuity residuals keeps fluctuating. is it alright if the residulas keep fluctuatuing between 1e-4 and 1e-5.

thanx for the advise

dive September 4, 2008 19:27

Re: amg divergence after 3500 iterations
 
i think it is good enough.

joh September 10, 2008 05:13

Re: amg divergence after 3500 iterations
 
thanks for the advise.



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