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Old   August 25, 2007, 22:25
Default Periodicity in CFX
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Sam S
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Hi there

I'm having some serious issues with using the periodicity function in CFX. The system I'm working on can usually handle standard 2D problems up to about 1,500,000 elements. However, I have recently moved to 3D and am working on a particular problem where a periodicity interface needs to be used. I am finding that even on course mesh problems with around 300,000 elements, the computer is returning an error saying "Insufficient Memory Allocated". If I remove the periodicity, this problem will solve, albeit incorrectly. Even after i have drastically increased swap space, I am still having this error. I know that CGI periodicity uses more CPU power and more memory, but this much? Does anyone have any suggestions? If so I would much appreciate any

Thank you very much,

Sam
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Old   August 26, 2007, 18:35
Default Re: Periodicity in CFX
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Glenn Horrocks
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Hi,

I use periodicity a fair bit and don't have the problem. I would check the periodic boundary is set up correctly, with faces parallel (if translational) or the rotation axis correct (if rotational).

Also - what physics are you using? Not all physics supports periodicity.

Glenn Horrocks
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Old   August 27, 2007, 00:59
Default Re: Periodicity in CFX
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johnny
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If your error states "Insufficient Memory Allocated", simply increase the memory allocation factor.
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