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AMG solver _divergence detected

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Old   March 10, 2009, 13:12
Default AMG solver _divergence detected
  #1
Shamoon
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Hi guys

I am simulating a problem with 0.3 M mesh size and density based solver with k epsilon model. When I ran 50 iterations the solution diverged displaying the message

Divergence detected AMG solver -temperature. Can anybody tell me what to do?

Regards
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Old   March 10, 2009, 13:24
Default Re: AMG solver _divergence detected
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Ash
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hey i have suffered from this problem several times if there is some problem in grid,may be you can try to run laminar problem with present grid first, reply if you solve the problem
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Old   March 10, 2009, 14:00
Default Re: AMG solver _divergence detected
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Shamoon
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We cant try to run on laminar because we have to use the turbulence model from the beginning. Its an assignment and we have ad edline on Friday
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Old   March 10, 2009, 16:30
Default Re: AMG solver _divergence detected
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Laci
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Stop the calculation at the ~40th step, nad 'Adopt' the grid. Sometimes it helps. Let us know, if it works please.
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Old   March 10, 2009, 18:39
Default Re: AMG solver _divergence detected
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Shamoon
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adapt the grid? but with respect to which gradient?
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Old   March 11, 2009, 01:18
Default Re: AMG solver _divergence detected
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Mandar
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what i wanted to you was that "c whether grid is fine if it isnt, right laminar model will also fail and you can look into geometry part of it instead of focussing on turbulence model "
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Old   March 11, 2009, 08:59
Default Re: AMG solver _divergence detected
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Laci
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First, I would try with temperature, than velocity.
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