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Old   February 3, 2012, 11:08
Default Negative cell volume detected, dynamic mesh
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Hi,

I am doing dynamic mesh using FLUENT, but always encounter the problem of 'Negative cell volume detected'. So what is simpliest way to solve this?

Because my case is very simple. A rectangle car is moving in a tunnel with speed of 1m/s. (I have to use dynamic mesh). I am try all the three method 'layering, remeshing and smoothing', but none of them work. Mesh simply deformed and did not merge or split so that Negative cell volume occurred. May I ask what method is the simplist one and what parameter should I use?

I have also tried to shorten to step time, but still of no use.


Thanks a lot!

Last edited by tony25800; February 3, 2012 at 12:00.
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Old   February 10, 2012, 02:49
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Under the dynamic mesh tab, use the preview mesh motion to and figure out where exactly your mesh is failing during motion.
And for your case, I would suggest keep the car stationary and move a flow of 1 m/s over it --> no dynamic mesh (if what you are analysing is the external flow over the car)
Else, Layering can be used only for a hex/quad mesh AND Remeshing can only be done on a tri/tet mesh.
Need more details on what you're analysing to help you better.

Regards
Luke
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Old   May 13, 2012, 09:15
Default negative cell volume detected
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Hi..i am having the same problem regarding on negative cell volume.. my case was like in the picture..please help me...
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Old   October 22, 2013, 10:03
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Hey,

Have you find any solution to your problem?
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Old   March 7, 2014, 06:32
Default Negative cell volume exists
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Hey abdulrauf.abdulrazak i to had same problem did u solve it
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Old   March 7, 2014, 06:34
Default Negative cell volume exists
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P NAGA SURESH KUMAR
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Hey abdulrauf.abdulrazak i to had same problem did u solve it

if so can you help me?

Thanks
Naga Suresh Kumar
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Old   September 17, 2014, 19:50
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Hi did anyone of you guys find a solution to this problem?
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