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Old   December 17, 2008, 20:39
Default GGI Information
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Can one of you who frequently refers questions to a page in one of the manuals tell me where I can find information about how closely the grids need to match at a GGI domain interface? I'm having some convergence issues and I'm wondering if it is because the grid spacing mismatch between the grids is too large at the interface.


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Old   December 18, 2008, 14:08
Default Re: GGI Information
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The grid of the two interfaces should be as equal as possible, but what kind of problem did you get? What do you mean with "convergence issue"? Of what type? Does the analysis stop? does the mass imbalance remain high?...
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Old   December 22, 2008, 00:08
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I've ever encounter the same problem. The tetra grid is about 3-4 times of hex grid. Also the convergence is not good. The pressure fluctuate heavily. After remesh the grid and made the two kind of grid uniform, this means the two of approximately same size. The oscillation disappeared.
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Old   January 19, 2009, 00:05
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This is probably more to do with the volume mesh than the surface mesh density difference at the interface.
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