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-   -   Help with this iterate problem (http://www.cfd-online.com/Forums/fluent/101368-help-iterate-problem.html)

conanzmj May 2, 2012 08:23

Help with this iterate problem
 
Good evening everyone.
What I am trying to simulate is a gear pump, but every time I iterate ,it comes the problem of 'Error: Update-Dynamic-Mesh failed. Negative cell volume detected.'
I have examined the grids in the gambit and checked it before iterating.But the problem always comes out after about 30 steps when I set the time step size of 0.0001s. Some authers suggest me to decrease the time step size. But if I decrease the time step size, the error comes out as well. I nearly tried everything that I can do, but still can't solve it. Can you help me and give some suggestions?
THANKS.


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