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Max residuals are far from poor quality cells

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Old   April 6, 2006, 07:40
Default Max residuals are far from poor quality cells
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Steven
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Hello to everyone!

I have a hardly conveging task. Suspect cell with low internal angle. I cannot fully avoid them, but their number is negligible among perfect other cells. Remarkably, the regions of maximum residuals are at a long distance from those poor-quality cells.

QUESTION: May I therefore conclude those cells are NOT the reason of my difficult covergence?

Thank you.
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Old   April 6, 2006, 19:00
Default Re: Max residuals are far from poor quality cells
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Glenn Horrocks
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Hi,

Check that the region of maximum residual is not simply convected from the region of poor mesh quality, but if not then yes, your conclusion sounds reasonable.

regards, Glenn
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Old   April 6, 2006, 21:58
Default Re: Max residuals are far from poor quality cells
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Steven
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Yes, Glenn, I did checked and re-checked it: the regions are 3D-space-separated; only one small piece of residual isosurface is located near (upstream) to the low-angle one, but is not overlapping and its shape is different from the low-angle isosurface piece.

Furthemore, the largest piece of (the highest) residual isosurface is located in the (central) area, where the grid if ~0.7-times finer than that in other areas.

Thank you for your help and very best regards.

Steven
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