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June 7, 2012, 18:20 |
problem with interfaces
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#1 |
Member
adam
Join Date: Oct 2011
Posts: 52
Rep Power: 14 |
I'm trying to simulate the convective cooling of a heat generating block in duct. I want the block to be defined as a solid, but I am having trouble creating the interfaces. I split the geometry by part curves, and then create another part based on the surfaces of the block. Then I send the two parts to regions, and define one as the air and one as the solid.
When I try to mesh I get an error that says one of the edges is shared by an odd number (3) of faces. At first I thought this meant I had somehow defined two faces on top of each other, and then when the cube meets the base of the duct that would result in edges being shared by three faces. However, there has to be the same surface defined in each region (one in air and one in solid) so you can select them both and define it as an interface, correct? The system looks something like this: |
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June 7, 2012, 18:54 |
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#2 |
Senior Member
Henry Arrigo
Join Date: Jun 2010
Location: Italy
Posts: 100
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Hi
I think you should use separate meshes for each region instead of one mesh for both regions. |
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June 7, 2012, 23:29 |
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#3 |
Member
adam
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June 8, 2012, 03:12 |
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#4 |
Senior Member
Join Date: Oct 2009
Location: Germany
Posts: 636
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You're both wrong.
First, you can create a conformal mesh, using one mesh continuum. It works when your geometry preparation is done the right way. That's everyday business. Second, you don't need a conformal mesh. It also works with a non-conformal mesh, but it will smear the solution a little at the interface. Conformal meshes are recommended, but not essential. sieginc.: Can you have a look on the surface repair? Do you have error free parts when you check them independently? Do both of your parts share the same block surface? Did you create the interfaces prior to meshing?
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June 8, 2012, 15:22 |
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#5 | |
Member
adam
Join Date: Oct 2011
Posts: 52
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Quote:
I will check the surface repair. The parts share the same block surface. I'm assuming this is the problem? However, doesn't the same surface have to show up in each region so I can select both to form an interface? |
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June 8, 2012, 16:17 |
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#6 |
Senior Member
Ryne Whitehill
Join Date: Aug 2009
Posts: 312
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For people new to interfaces, definitely recommend "Split by topology". It gets everything set up for you!
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June 10, 2012, 14:35 |
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#7 | |
Senior Member
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Location: Germany
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Quote:
I also agree to rwryne, split by topology would be easier.
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