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Need help with Dynamic Mesh Simulation

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Old   November 26, 2013, 05:16
Default Need help with Dynamic Mesh Simulation
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Shirish Manchalwar
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I am doing a 2D single phase simulation for a check valve.
I am trying to move the valve in the negative x-direction using the Udf given in fluent dynamic mesh tutorial.
The Mesh is shown in figure 1
(Please See Attachment Figure.1 & Figure2)
when I am trying to do the unsteady state simulation
following message is dispayed
"Non-Positive volume exists"
Error: divergence detected in AMG solver: x-momentum
Error Object: ()
and the grid looks like shown in figure 3 (Please See Attachment)

figure1.jpg

figure2.jpg

figure3.jpg
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Old   November 26, 2013, 06:36
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Vignesh KPV
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Hi,

Could You please post your udf. So that I could help you

Regards,
Vignesh
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Old   November 26, 2013, 06:56
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Shirish Manchalwar
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Please Find the valve.cudf attached
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dynamic meshing, fluent - udf, valve simulation

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