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-   -   Negative volume Detected in Dynamic Mesh after 1500 time steps (http://www.cfd-online.com/Forums/main/107006-negative-volume-detected-dynamic-mesh-after-1500-time-steps.html)

abhinavgupta88 September 14, 2012 14:23

Negative volume Detected in Dynamic Mesh after 1500 time steps
 
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

cdegroot September 16, 2012 09:31

Try the fluent forum. You are more likely to find a fluent expert there.

shuai_manlou September 17, 2012 20:55

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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