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[ANSYS Meshing] Mesh a pipe

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Old   July 6, 2016, 10:14
Default Mesh a pipe
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Hi all,

I would like to mesh the inside of a pipe using the Ansys meshing tool. Basically, this pipe is a static mixer, generated via Solidworks, and is made of a hollow tube that contains two vanes. My aim is to eventually analyse a two-phase flow inside this tube.
Can I mesh the void part of the pipe even if it is hollow? And if yes, how to do so?
At first, I clicked on Generate Mesh which simply meshed all the surfaces of my geometry. But I'd like to go further and make a 3d mesh of the inside as well...

Thank you for your answers

PS: It's my first time on here so if there is any information lacking, please let me know and I'll provide it to you.
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Old   July 8, 2016, 04:53
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Old   July 8, 2016, 16:55
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basically you have to make the solid inside the volume where flow will be passing.

For this you have to put two or more surfaces on inlet(s) and outlet(s) and make a solid.

Once it is done, mesh inside.

Last edited by Far; July 9, 2016 at 13:19.
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Old   July 9, 2016, 09:24
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Quote:
Originally Posted by Far View Post
basically you can have to make the solid inside the volume where flow will be passing.

For this you have to put two or more surfaces on inlet(s) and outlet(s) and make a solid.

Once it is done, mesh inside.
Thanks a lot for your answer, Far!

Basically, that's what I did. Yesterday, I eventually discovered that it was possible to produce a solid inside my existing geometry thanks to the "fill" feature. I did that, using the "fill by caps" option and it seemed to work until I meshed it. Then there were several error messages, among which one that says that some parts of my geometry overlap with each other. I'll send you an image later on so that you can see.
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Old   July 12, 2016, 05:21
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Here are the pictures of my mesh:





And there,
My geometry:



Which is hella weird because as you can see on the previous picture, the lower blade is not represented correctly when I do the mesh, even though it appears in the geometry.

Also, here is what I can see on workbench:
1- Before putting the mesh as an input in Fluent


2- After that


At first, the meshing tool doesn't display any error, only some warnings. In the second case, I cannot inject the mesh properly in Fluent.
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Old   July 12, 2016, 07:21
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Sorry for the double post, but here are the messages displayed when I try to update the mesh after linking it to fluent:

Error > The mesh file exporter does not support overlapping geometry in Contact Regions. Please resolve the issue and try again.

Warning > Copying the source mesh to the target face failed because of poor quality. Please preview your surface mesh, review the mesh, and set or adjust size controls to help the sweeper generate higher quality source and target face meshes. After you are satisfied, please try to generate the volume mesh again.

PS:

Here are the mistakes I get when generating the filling solid inside my geometry

Last edited by Bubbly; July 12, 2016 at 09:47.
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bubble flow tracking, complex geometry, fluid dynamics, hollow cylinder, mesh 3d

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