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-   -   failure in dynamic mesh updating (http://www.cfd-online.com/Forums/fluent/41305-failure-dynamic-mesh-updating.html)

Fabrice June 8, 2006 01:56

failure in dynamic mesh updating
 
Hi everybody,

I've got a model with a moving wall. Unfortunately the mesh isn't updated whereas I specified it in the dynamic mesh panel. So after a few iterations, I've got this message:

Mesh Statistics: Min Volume =-6.89746e-002 Max Volume =5.99320e+004 Warning: negative cell volume detected! Error: Update dynamic mesh failed! Error Object: ()

Any idea will be really appreciated! Many thanks.

bijan June 8, 2006 04:47

Re: failure in dynamic mesh updating
 
Hi i had same problem as you. you must change your remeshing and smoothing parameters to get a suitable mesh. hope you to be successful.

Fabrice June 12, 2006 04:57

Re: failure in dynamic mesh updating
 
Hi guy,

Thank you very much for your advice. Furthermore I don't understand very well the example in the manual about the macro: DEFINE_GRID_MOTION. Can you please send me your UDF above all if it's a simple one!! My address is: alt_fabrice@hotmail.com

Cheers,

Fabrice.


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