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[ANSYS Meshing] Meshing a Circular Face by Mapping it

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Old   December 5, 2016, 13:07
Default Meshing a Circular Face by Mapping it
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ISV
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Hello.

I'm trying to generate a certain mesh for a circular geometry. The solids I am modeling are helical wires conforming a cable (one straight central fibre and two layers of wires around it).

I want to map the sections of each wire but I have no clue how. I've looked everywhere on the internet but there's no explicit explanation on how to do it.

I generated the geometry in AutoCAD and imported it to ANSYS 15 and then opened the project in ANSYS 17.2.

I would love if you can help me on what to do with each circular face in order to get the meshing I need.

This is the meshing I'd like to achieve:



Regards.
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Old   December 5, 2016, 13:44
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Originally Posted by ISV View Post
Hello.

I'm trying to generate a certain mesh for a circular geometry. The solids I am modeling are helical wires conforming a cable (one straight central fibre and two layers of wires around it).

I want to map the sections of each wire but I have no clue how. I've looked everywhere on the internet but there's no explicit explanation on how to do it.

I generated the geometry in AutoCAD and imported it to ANSYS 15 and then opened the project in ANSYS 17.2.

I would love if you can help me on what to do with each circular face in order to get the meshing I need.

This is the meshing I'd like to achieve:

Regards.
It's better to generate o-grid for such geometry. Use MultiZone method and apply Mapped Face to circular face for this.

But to get what's on picture you can split geometry to pieces and use Sweep method.
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Old   December 6, 2016, 14:25
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Quote:
Originally Posted by Antanas View Post
It's better to generate o-grid for such geometry. Use MultiZone method and apply Mapped Face to circular face for this.

But to get what's on picture you can split geometry to pieces and use Sweep method.

Thank you for replying.

I get what you suggest. The second option (splitting and a sweep method) sounds reasonable but I'm not sure how to achieve that.

Regards.
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Old   December 6, 2016, 17:42
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Originally Posted by ISV View Post
Thank you for replying.

I get what you suggest. The second option (splitting and a sweep method) sounds reasonable but I'm not sure how to achieve that.

Regards.
Check the image I uploaded. Split is in quarters. Then in sweep method control define source face and target face for each of the quarters. Mesh the quarters one after another.

Mesh the quarters in the numbered sequence. You can record the meshing sequence using meshing worksheet, so that you can replay the same sequence automatically next time you mesh.
Attached Images
File Type: png O-grid-by-sweep.png (16.0 KB, 12 views)
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Old   January 4, 2017, 12:48
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Originally Posted by sarangdalne View Post
Check the image I uploaded. Split is in quarters. Then in sweep method control define source face and target face for each of the quarters. Mesh the quarters one after another.

Mesh the quarters in the numbered sequence. You can record the meshing sequence using meshing worksheet, so that you can replay the same sequence automatically next time you mesh.
Thank you very much. I managed to generate that meshing but came across a bigger problem: sice I have to slice every body, I get to many contact surfaces and more nodes, which require more computational resources I don't have.

Is there a way to tell the program that the nodes in one body (that comes from one of the fibres of the cable) that is adjacent to another one node in the opposite face are the same? Is there a way to, through the mshing, discard all the internal faces of the divisions of each body? I know I can just make all those connection as Bonded but still that is more CPU usage.

Best regards.
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Old   January 4, 2017, 16:45
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Try using node merge under mesh edit tool
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Old   January 4, 2017, 16:59
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Originally Posted by sarangdalne View Post
Try using node merge under mesh edit tool
I tried that but it looks like Mechanical won't merge because it considers that to individual bodies with a contact interaction between them should not share nodes.
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