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ANSYS Meshing: Create Conformal Interface

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Old   March 8, 2018, 06:10
Default ANSYS Meshing: Create Conformal Interface
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Emanuele Spinosa
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Hi everyone,

I just wonder if it is possible to create a conformal interface with ANSYS Meshing in the contact region between a circular cylinder and a cube. The cylinder is in contact with the cube and its diameter is smaller than the cube side length.

I would like the mesh in the cilinder face to be the same as that on the cube face in correspondence with the intersection region, which is a circle. In this way there is no need of an interpolation and the results of my CFD simulation should be more accurate.

Please let me know if there is an easy way to do it. I tried to find some information about this in this forum and online, but I wasn't able to find it.

Cheers,

Emanuele
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Old   March 8, 2018, 06:45
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Gert-Jan
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Add a picture.
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Old   March 8, 2018, 08:12
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Emanuele Spinosa
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This is a simple example. See attached picture. Thank you.
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Old   March 8, 2018, 08:53
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This is very basic stuff. Read the manuals better.

Make sure both volumes have a share topology. Meaning that they have something in common. If you visualise the cube only, do you see a circle on the rectangular surface? Did you imprint the base surface of the cilinder?

If everything went ok, you should have two volumes in ANSYS meshing and NO Connections.
Why do you bother about conformal mesh anyway. Is somehting rotating? Or is it heat transfer between solid and fluid? Or something else?
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Old   March 8, 2018, 09:22
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There is heat transfer in bewteen. The cylinder and the cube are different bodies and are made from different materials. The face in common is split, meaning that the circle part is visible and selectable in the cube too. I read the manua, but I could not do it. Probably it is not a problem for the simulation, but I feel it's better if the shared part is meshed in the same way. What do you think? Thanks for your help.
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Old   March 8, 2018, 09:28
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I think it is much better to have a so-called conformal mesh.
What CAD package do you use?
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Old   March 8, 2018, 09:33
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Ok, I used Solidworks for the CAD, but I don' think this is relevant. Please tell me how to apply the conformal mesh at the interface, this is exactly what I'd like to have. Thanks a lot again.
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Old   March 8, 2018, 09:34
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If I understand your question correctly I would go back one step to DesignModeler (if you are using that). There you can select both bodies in the drop-down menu on the left -> right click them -> form new part

This will put the bodies under a single part and when you operate with them in ANSYS Meshing it will make a conformal mesh automatically.

Hope that helps

EDIT: I see that you used Solidworks. Perhaps it works aswell like this with an imported geometry. Or if the geometry is simple enough, maybe you can recreate it in DM
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Old   March 8, 2018, 09:40
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Quote:
Originally Posted by emspinosa View Post
Ok, I used Solidworks for the CAD, but I don' think this is relevant. Please tell me how to apply the conformal mesh at the interface, this is exactly what I'd like to have. Thanks a lot again.
The source of your problem is in drawing, not in the mesher.
You should modify it in Design modeler as Iorbeki explained, or in SPaceclaim. In Spaceclaim, you must make sure that both object share topology. They not necessarily have to be in one part.

BTW, why do ask this in the Main CFD Forum? There is a dedicated forum on ANSYS Meshing.................
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Old   March 8, 2018, 14:19
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Yes, can anyone move the post to Ansys Meshing Forum?

The thing is the two bodies have different properties, so I'd like to keep them as two bodies ... Can I do this with Design Modeler?
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Old   March 8, 2018, 16:42
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Certainly. Just look in the tutorials. Basic stuff.

The properties will not be set in the geometry, They won't be set in the meshing. They will be set in third step. So don't bother now. You are 2 steps too early.
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Old   March 8, 2018, 18:55
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Yes, I managed to do it. Just a last simple question: to do this, do I have to split the face below the cylinder i.e. on the cube necessarily? In other words, do I have to project the cylinder base circle on the cube face in contact with it? I have to repeat this in a much more complicated geometry and I would like to know this.

Cheers again,

E.
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Old   March 8, 2018, 19:10
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Yes, they must have something in common.
I know how it works in Spaceclaim, even for very complicated geometries. It is in fact quite simple. I am not familiar with Design modeler.
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Old   March 8, 2018, 19:13
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Quote:
Originally Posted by Gert-Jan View Post
Yes, they must have something in common.
I know how it works in Spaceclaim, even for very complicated geometries. It is in fact quite simple. I am not familiar with Design modeler.
Can I ask you how is it done in Spaceclaim too? I might have to use Spaceclaim too in the near future ... Thanks a lot
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Old   March 9, 2018, 05:35
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I already explained this a few lines up.
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Old   March 10, 2018, 08:24
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Can I ask you why if I put all the bodies in a single part, CFX does not recognize the named selections at the interfaces between the bodies?

Cheers,

E.
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Old   March 11, 2018, 08:56
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That is impossible to say without having your case at my hand.
You can share through a PM it if you work with Spaceclaim.
I don't work with Designmodeler.........
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