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[ICEM] Meshing of a Flat perforated plate (Zero thickness)

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Old   June 11, 2013, 05:53
Default Meshing of a Flat perforated plate (Zero thickness)
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I am trying to analyze the flow through a flat perforated plate kept at the middle of the duct.

Since it is of zero thickness, there will be connectivity issues when generating mesh. I am planning to make a structured mesh using blocking technique in ICEM CFD.

I would like to know if there is a way to unpaste the surface of the perforated plate such that the plate has imaginary thickness and hence two surfaces: top and bottom.

Thanks in advance!
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Old   June 11, 2013, 06:15
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Technically, the plate of zero thickness will have (nearly) the same characteristics as a plate with t/d ratio of 0.015; where t is thickness of plate and d is the diameter of the hole on the perforated sheet. How about modelling it like that?

Be aware that if you decide to go like this, you need at least three elements along the thickness (with recommended value of 5).

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Old   June 11, 2013, 06:19
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Hi hammer,

Can you share pictures?
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Old   June 11, 2013, 07:50
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Thanks a lot for the prompt reply.
Please find attached the pictures of my model.

I can assume a small thickness, but I don't know if it would come well. The problem statement given to me specifically stated zero thickness. I know there will be difficulty while mapping.

But is there a tool in ICEM blocking so that it creates two different surfaces on the plate?
Attached Images
File Type: jpg Perforated plate 1.jpg (74.4 KB, 45 views)
File Type: jpg perforated plate 2.jpg (19.7 KB, 31 views)
File Type: jpg perforated plate 3.jpg (25.0 KB, 32 views)
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Old   June 11, 2013, 10:27
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the meshing process can be long but not difficult. make various split and association for the holes, for the plate you will need to associate face with surfaces. since you have a pattern, a more convenient way to do it is to block and mesh one sector; and duplicate that with either transforming the blocks or the mesh...
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New to ICEM CFD, try this document --> http://goo.gl/G2gkE
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Old   June 11, 2013, 10:40
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There is no need to give thickness to plate for meshing purpose. Just make the o-grids for holes and associate face to surface for zero-thickness plate be recognised by ICEM.
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