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[ANSYS Meshing] Match control at interface between two separate geometries

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Old   April 11, 2013, 22:02
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David
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Not sure that you quite understood what I meant. I've attached some images to clarify. The stationary region should be hollowed out (like a ring or doughnut shape) and should surround rotating region. This will give you two separate parts, each with it's own interface surface.

Also, it looks like your rotating region has a smaller height that your stationary region. This is fine, but be aware that you will also need to set up interfaces at the top and bottom of the inner cylinder (as well as the curved surface).
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File Type: jpg stationary.jpg (22.9 KB, 42 views)
File Type: jpg rotating.jpg (25.1 KB, 43 views)
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Old   November 14, 2013, 10:56
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Dimitris Romanas
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Hi all,
i have the 'same' problem. It was created two lines one for one surface and one for the other surface. I have two cell zones as well, but when i go to panel
mesh--->info--->zones--->

Zone sizes on domain 1:
249 mixed cells, zone 3.
145 quadrilateral cells, zone 4.
458 2D interior faces, zone 1.
265 2D interior faces, zone 2.
6 2D wall faces, zone 7.
18 2D wall faces, zone 8.
12 2D wall faces, zone 9.
18 2D wall faces, zone 10.
4 2D wall faces, zone 11.
18 2D wall faces, zone 12.
12 2D wall faces, zone 13.
32 2D wall faces, zone 14.
451 nodes.

But i have 2 cell zones, and it said domain 1...why did it do that???why one domain??
thank you in advance!
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Old   November 14, 2013, 20:30
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David
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I presume that this is a 2D model that you have set this up with Ansys meshing and Fluent?

In Fluent, a domain and zone are not the same thing. The domain is the complete assembly of all your meshes combined together. A zone is a line, surface or volume component of the domain.

First, make sure that you 'freeze' each 2D surface that you create in Ansys Design modeler. This will create a separate part for each surface (rather than letting the 2D surfaces combine to form one part).

Next, make sure that you set up each boundary and 2d region as a 'named selection' in Ansys Mesh.

Finally, in Fluent, your named selections will appear as zones. If you select 'Cell Zone Conditions'/'Boundary Conditions' your zones should appear as you have defined them. Then, to set up you interface, you should be able to find your two interface zones if you select 'Create/Edit...' under 'Mesh Interfaces'.

If this doesn't help then you're going to have to provide me with more detail as to how you've gone about setting up you geometry, mesh, etc..
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Old   November 15, 2013, 00:22
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Defining the interface in FLUENT if it any spell mistake if you define it AMP or DM,it read it as wall in FLUENT,so check in boundary condition
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Old   November 15, 2013, 07:01
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Thank you both for your clarifications. I am trying now this and i ll inform you!
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Old   November 15, 2013, 11:46
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Dimitris Romanas
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Quote:
Originally Posted by davidrobinson50 View Post
I presume that this is a 2D model that you have set this up with Ansys meshing and Fluent?

In Fluent, a domain and zone are not the same thing. The domain is the complete assembly of all your meshes combined together. A zone is a line, surface or volume component of the domain.

First, make sure that you 'freeze' each 2D surface that you create in Ansys Design modeler. This will create a separate part for each surface (rather than letting the 2D surfaces combine to form one part).

Next, make sure that you set up each boundary and 2d region as a 'named selection' in Ansys Mesh.

Finally, in Fluent, your named selections will appear as zones. If you select 'Cell Zone Conditions'/'Boundary Conditions' your zones should appear as you have defined them. Then, to set up you interface, you should be able to find your two interface zones if you select 'Create/Edit...' under 'Mesh Interfaces'.

If this doesn't help then you're going to have to provide me with more detail as to how you've gone about setting up you geometry, mesh, etc..
Hi and thank you for advices,
so still have a problem...i created different sketches for every line and i cannot make surface for different sketches...it told me no closed profiles..
Otherwise when i have surfaces frome edges, there is no option to be 'freeze' or not.
I dont know what i should do.
Do you want to send you my geom to your email??
My email is jimromanas@hotmail.com
Thank you in advance!
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Old   November 18, 2013, 06:15
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David
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This link will hopefully explain how to create a frozen surface from a sketch http://www.kxcad.net/ansys/ANSYS/wor...ches3dmod.html

Make sure that your sketch is closed and not self-intersecting, otherwise you won't be able to extrude it or create a surface from it! To create a frozen surface, just select "add frozen" instead of "add material" before you generate the geometry. If you're having trouble getting your head around this then I suggest going through some of the ANSYS tutorials - they'll probably explain this better than I can.

If you really need me to look at your geometry I'm happy to do it - but I'd prefer it if you upload it to dropbox (or something similar) for me to download it from.
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Old   November 18, 2013, 08:25
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Dimitris Romanas
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Hi david,

so i really want to see my geometry and tell me my 'errors'..
the file is too small and i can to send you in mail...
but i need an email of you...(for dropbox).
Plz send me your mail in jimromanas@hotmail.com
or send mt your mail in private message here

Regards
Dimitris
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Old   December 22, 2013, 13:19
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Hello John and David

I am modeling a a Vertical axis wind turbine where I have to breakdown the model into several rotating domains.
I am facing the same problem. Any new on the subject? How did you manage to solve it
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Old   December 22, 2013, 13:21
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Hello John and David,

I am modeling a Vertical Axis wind turbine which requires several rotating domains in a stationary domain.
I am facing the same problem.
Any new on the topic? How did you manage to solve it?

Thanks
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