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amg divergence after 3500 iterations

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Old   August 29, 2008, 11:15
Default amg divergence after 3500 iterations
  #1
joh
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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?

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Old   August 29, 2008, 19:23
Default Re: amg divergence after 3500 iterations
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dive
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refine ur grid or use PRESTO option for pressure interpolation.
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Old   August 31, 2008, 06:26
Default Re: amg divergence after 3500 iterations
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joh
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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
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Old   September 4, 2008, 19:27
Default Re: amg divergence after 3500 iterations
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dive
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i think it is good enough.
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Old   September 10, 2008, 05:13
Default Re: amg divergence after 3500 iterations
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joh
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thanks for the advise.

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