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Old   March 18, 2015, 13:45
Default Lobe Pump Analysis
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I am facing error in Mesh Motion in Fluent,

Warning : non-positive volumes exist.

Error: Update-Dynamic Mesh failed. Negative cell volume detected.
Error Object : #f

Another Problem is for what we locate POINT ON PLANE and PLANE NORMAL?
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Old   March 19, 2015, 09:35
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Paritosh Vasava
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To avoid the 'Negative Cell Volume' you can use a smaller time-step. Time-step small enough so that the distance covered is smaller than the size of the smallest element. You can also play around the dynamic mesh parameters to have a better mesh after each time step.

If you have selected the side faces as symmetry, you can just leave them for now.
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Old   March 20, 2015, 02:32
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Sir the side faces are defined as DEFORMING MESH ZONES as PLANE.

I took time step size as 5e-4 and number of time steps as 1000.
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