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"error message:negative volumes exist"

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Old   June 18, 2005, 10:39
Default "error message:negative volumes exist"
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hash
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hello friends; i m making modeling for flow around the moving car.i made mesh around the car while running in fluent during grid check it gives an erroe message that negative volume exists.can u please give any info about it? what kind of problem it is ?
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Old   June 19, 2005, 00:44
Default Re: "error message:negative volumes exist"
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Mehdi Ghoddosy
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Dear Hash:

Negative volume means that some cell on your grid are overlapped and/or disattached. Means improper connectivity. You can eliminate this problem using Iso-value adaption. However if you want to see these cells use adaption->iso-value->mark.

Regards
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Old   June 19, 2005, 01:38
Default Re: "error message:negative volumes exist"
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Masood
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hi i faced the same problem when tried to mesh with a larger mesh size than a small dimension in geometry. i remshed and problem is loved. but as MEHDI said Iso-value adaptation, what fluent do to the mesh to remove -ve volumes. isnt remeshing is more appropirate. because i got only 1 -ve vloume and funny thing i can not see it. so i remshed
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