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Error message in Fluent

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Old   March 26, 2016, 11:23
Default Error message in Fluent
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oyeniran oluwatosin
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Hi everyone. I got this error message while loading my mesh in fluent.

'The default algorithm used to compute the wall
distance required by the turbulence models might
produce wrong results in these cells.
Please inspect the wall distance by displaying the
contours of the 'Cell Wall Distance' at the
boundaries. If you observe any irregularities we
recommend the use of an alternative algorithm to
correct the wall distance.
Please select /solve/initialize/repair-wall-distance
using the text user interface to switch to the
alternative algorithm'.
I didn't how to go about solving d problem. Help will be appreciated. Thanks
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Old   March 28, 2016, 15:09
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Lucky
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This isn't a problem, it's a warning. This warning is usually displayed when high aspect ratio cells are detected.

High aspect ratio cells are sometimes intentional, like when you have prism layers near the wall, it's very easy to end up with high aspect ratio cells, which will then cause this warning to show up.

Wide and flat cells that result in high aspect ratios are okay, but narrow and tall cells are not because the nearest wall may be an adjacent wall (a different wall than the intended wall) which will mess up the distance in the y+ calculation.

If you know what you're doing with your mesh, then you can ignore the warning. There's no way to make it go away except to remove the high aspect ratio cells. I forget what the threshold is.
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Old   March 28, 2016, 22:40
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oyeniran oluwatosin
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Alright. A million thanks
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