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Negative volume Detected in Dynamic Mesh after 1500 time steps

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Old   September 14, 2012, 14:23
Default Negative volume Detected in Dynamic Mesh after 1500 time steps
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I am running a simulation of a 2D Piston. The geometry is an enclosed 2D rectangle, in which two sides are the piston. I am using Fluent. The motion of the pistons are specified by UDF. I am using dynamic mesh. The size of the time step is 2E-6 and the Cell height I am using is 8E-5. My case ran fine for 1500 time steps but it gave me an error of Negative Volume. I appreciate if anyone can help
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Old   September 16, 2012, 09:31
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Try the fluent forum. You are more likely to find a fluent expert there.
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Old   September 17, 2012, 20:55
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How do you use you dynamic mesh, which method is applied for its motion, layering, smoothing or local re-meshing ? Maybe different results can be obtained ~
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