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Old   July 29, 2010, 08:07
Default Problem with interfaces
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Hello I'm from Germany,

I try to simulate a round filter cartridge.
I created 3 bodies:
1 body: inner fluid region
2 body: filter (porous reagion)
3 body: external fluid reagion
(see attached file)

Then I created the interfaces (In-Place).

When I try to mesh, I get this error-message: "Could not match up perimeters of bounderies interface fi and interface i"

Can someone help me?

Thanks
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Old   July 29, 2010, 15:43
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Vinicius Girardi
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How did you defined the regions? did you split by surface topology or create the interfaces manually? Try to create them again..
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Old   July 29, 2010, 15:49
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I created 3 bodies in catia an imported them in 3 regions...
how can i split by surface topology?
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Old   July 29, 2010, 16:02
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Vinicius Girardi
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You must have to create a single region where the edges that shares the "external fluid/filter/inner fluid" faces must be marked as a non-manifold edges... so the software will understand that they are 3 different regions and split them creating the interfaces automatically..

Note that the faces that are common in 2 regions, are in fact just one face, that will be automatically duplicated in the interface creation
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Old   July 30, 2010, 04:05
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Hm... I'm still not understand. Sorry.
Where schould I create one reagion with non-manifold edges?
In Catia or CCM+?
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Old   August 19, 2010, 04:14
Default hi friend plz check this
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you told that you had created inplace interface in which u should specify contact option
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Old   August 24, 2010, 05:33
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Thanks for help. I solved the problem. I converted the surface to interface and then combined them with the different reagions, and it works.

But now i have a problem with an other model.
I simulated a model without any filters, only fluid reagion.
I get a total pressure difference between inlet and outlet about 3500pa with 600 iteration steps.

Now I modifited my model and put the filters in. But in first step i wanted to simulate this model without any porous options. So I defined the filter reagions as fluid with interfaces.

I simulated this model on a 64bit 8core an 16GB ram machine and I get in 40000 !!! iteration steps only 1300Pa pressure difference. Is that normal?

Pete
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