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February 11, 2006, 06:53 |
Dynamic mesh
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#1 |
Guest
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Hello to all,
I have a problem: I'm using the dynamic mesh technique with a profile; when I say to Fluent to iterate, the following message appears me: WARNING: non-positive volumes exist. Error: Update-Dynamic-Mesh failed. Negative cell volume detected. Error Object: () what means? someone can help me? Thanks |
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February 11, 2006, 07:12 |
Re: Dynamic mesh
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#2 |
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How did you generate your mesh?
Did you use Gambit? or a third party mesher? |
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February 11, 2006, 07:19 |
Re: Dynamic mesh
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#3 |
Guest
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Ciao Giuseppe, are you running an unsteady analysis, right? Unfortuantely Fluent dynamic mesh algorithm is not very robust. Try lowering time-step and raising spring-iteration. Luca
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February 11, 2006, 08:30 |
Re: Dynamic mesh
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#4 |
Guest
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To Alan,
I have generate a quad map grid with Gambit. Thanks for reply |
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February 11, 2006, 09:17 |
Re: Dynamic mesh
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#5 |
Guest
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Amico Giuseppe, Did you get it to work? I've run into that problem too. I know it's painful. What I found is that you need to move the boundary in steps that are shorter than the distance between 2 nodes, try half of the distance between 2 nodes. Let me know what you found. Ciao ragazzo Javier
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