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HELP!a problem when starting the unsteady iteration in Fluent

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Old   January 19, 2010, 09:56
Default HELP!a problem when starting the unsteady iteration in Fluent
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xuusst
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I have a problem when starting the unsteady iteration in Fluent,and it said——"warning:non-positive volumes exist.
Error:divergence detected in AMG solver ressure correction
Error object)

I guess something wrong with my original grid in Gambit?
hELP ME!THANK YOU!
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Old   January 20, 2010, 13:41
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raditya yudha
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You might to reconsider your meshing result from GAMBIT. Check your mesh result. Have a look on your right corner of your GAMBIT window to this. The 'non-positive volume' exist due to the highly-generated skewness.
As for the divergence problem,you can prevent this by setting your 'under-relaxation factor'. Make it smaller.
Hope this short reply would solve your problems.

Regards,
Raditya
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Old   January 21, 2010, 02:37
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Thank you for your kind advice,Raditya
Yes,the blade in my model has a very high skewness,so I 'm trying to use the Boundary Layer or Sizefunction to make a better mesh
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