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Cell definition diffrence

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Old   June 10, 2013, 04:23
Default Cell definition diffrence
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Zeregaber Moghes
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Hello All,

After running a simple model of water flow in an open canal. I get a part of the domain a little bit bigger than the neighbouring region. Eventhough the canal is straight I see a step in one specific area. Actually this area is defined by a smaller mesh size. Is there any difrence in the definition of a given cell in the preprocessing and post processing (cell defined by its center or by the edges)?

I appreciate your comments in advance.

Regards,
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Old   June 12, 2013, 08:41
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michael barkhudarov
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Quote:
Originally Posted by Zerit View Post
Hello All,

After running a simple model of water flow in an open canal. I get a part of the domain a little bit bigger than the neighbouring region. Eventhough the canal is straight I see a step in one specific area. Actually this area is defined by a smaller mesh size. Is there any difrence in the definition of a given cell in the preprocessing and post processing (cell defined by its center or by the edges)?

I appreciate your comments in advance.

Regards,
No, it should be the same. Are you using multiple mesh blocks with different resolutions? If so, the pre-processor may show a small gap between them (or a change in cross-section), but it is most likely a plotting glitch rather than a real problems.

The pre-processor reports the differences in open areas at adjacent block boundaries. Look in prpout file, search for 'information' to see the actual numbers.
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Old   June 12, 2013, 16:48
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Zeregaber Moghes
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Thank you MuxaB.

Yes I am using multiple mesh blockes and I clearly understand your point. The trend of the selected paramter as well as the values don't get changed only the gap is the problem.
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Old   July 13, 2013, 14:31
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michael barkhudarov
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Then it is most likely a plotting artifact.



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Thank you MuxaB.

Yes I am using multiple mesh blockes and I clearly understand your point. The trend of the selected paramter as well as the values don't get changed only the gap is the problem.
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Old   July 14, 2013, 12:58
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Zeregaber Moghes
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it is basically a problem related with the nested mesh block definition. with better transition and mesh plane at the ends of the nested mesh block this problem was sorted out. In fact it helped me in detecting any problems in the mesh definition.
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Old   July 14, 2013, 14:25
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Zeregaber Moghes
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i don't think it has anything to do with the plotting.
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Old   July 14, 2013, 17:55
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Glad you figured it out. Nice work!


Quote:
Originally Posted by Zerit View Post
it is basically a problem related with the nested mesh block definition. with better transition and mesh plane at the ends of the nested mesh block this problem was sorted out. In fact it helped me in detecting any problems in the mesh definition.
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