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Holes in the body in Fluent

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Old   February 10, 2011, 04:57
Default Holes in the body in Fluent
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Mikaela Flodin
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I'm having trouble with "holes" in the body in Fluent. The body is a quadratic shaped channel. The holes are not present in the geometry or in the mesh but can be seen in the velocity or pressure profile after the runnings. I do not receive any error messages for this but the profile is not complete.
Does anyone know what I should do about this? Thank you in advance.

Kindest regards
Mikaela

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Old   February 11, 2011, 02:20
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Hi,

this is just a guess, but probably you have specified ranges for the conntours because of which the part of the surface not included in the range for velocity or pressure is not being displayed in the contour which is appearing as a hole.

try changing the range in the contour plot to auto or an equivalent option so that part of the surface is not clipped in the display
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Old   February 11, 2011, 03:51
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Mikaela Flodin
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Thank you very much for your reply . We have change the limits for the display for the profiles and it didn't help but maybe we need to change it even further, but for us it seems strange that this parts will have a much lower or higher value than the other parts. Do you have any more suggestions on what can be wrong?

// Mikaela
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Old   February 11, 2011, 04:32
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hi,

do not try to second guess the solution. Just specify the range for the contours as auto, you do not need to specify the max and min, FLUENT will do this job for you and determine the maximum and minimum and set a global range.

If this does not work you can always click on the point in the contour plot where the apparent hole is located and it will should show you the value of the velocity at that point. Otherwise create a point and then check the value of the velocity and pressure at that point.

If the point shows no velocity or pressure data even though you have an iterated solution it implies you need to check your geometry and mesh.If you find that the problem is with your geometry and mesh you need to check the tolerances specified for the geometry.

Also you only specify max and min at times when the global variation is high that you cannot observe the local variation which does not seem to be the case in ur problem, so I do not see the need to specify the max and min values.

Hope this helps
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