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[ICEM] Meshing an irregular geometry

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Old   March 2, 2012, 15:42
Default Meshing an irregular geometry
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Fabio Tabacow
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Hi,

I have a ""stl file" that it is a irregular geometry, and with ICEM CFD I saw that I can import this file to this software, but now, I have a problem....How can I build the mesh in my geometry????

I was reading the guide, and apears some doubts.... I need to make a surface to build the mesh or I can build the mesh only with this geometry???

sorry about the english..heheh...

Thank you!
Fabio
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Old   April 7, 2012, 06:50
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You can use the blocking method or an unstructured mesh (eg octree) to mesh a STL surface, similar to other file formats. Just extrude the curves on the edge of the surface to create a volume if that's what you need. What do you mean by irregular though?
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Old   April 7, 2012, 16:01
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Chris DeGroot
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I have meshed several stl surfaces successfully. For a complex surface (i.e. anything biomedical or resulting from some kind of scan of a physical object) your best bet is to use an Octree mesh. If you are using for CFD you should then delete the volume elements, smooth the surface mesh, and generate a Delaunay volume mesh. You can then smooth the Delaunay mesh if desired. Also, it is typically a good idea to "build topology" before you start meshing. However, for a complex surface this usually leads to a lot of curves that don't really capture any geometric features. Delete any such curves before meshing. Also delete any extraneous points.
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Old   July 2, 2012, 14:25
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Fabio Tabacow
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Irregular geometry in my case, is the geometry of a real artery......

I have de surface of an abdominal aortic aneurysm..... I will try to do what you said.....

I built the topology to have some curves and points, and all curves and points have the same part of the surface.........How can I move this curves for the new part that I created?

Thank you for the help!!!
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Old   July 2, 2012, 14:34
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Fabio Tabacow
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The geometry that I'm working at is the picture that I attached...
Attached Images
File Type: png ICEM PIC.png (86.1 KB, 35 views)
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Old   May 7, 2014, 15:58
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Azadeh Saeedi
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Quote:
Originally Posted by cdegroot View Post
I have meshed several stl surfaces successfully. For a complex surface (i.e. anything biomedical or resulting from some kind of scan of a physical object) your best bet is to use an Octree mesh. If you are using for CFD you should then delete the volume elements, smooth the surface mesh, and generate a Delaunay volume mesh. You can then smooth the Delaunay mesh if desired. Also, it is typically a good idea to "build topology" before you start meshing. However, for a complex surface this usually leads to a lot of curves that don't really capture any geometric features. Delete any such curves before meshing. Also delete any extraneous points.
you know, I saw the same as you described in the manual. I tried it out many times and it didn't work. but the way you said it, it works! thanks alot
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Old   May 7, 2014, 16:03
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Chris DeGroot
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That's great. I'm glad it worked for you!

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Originally Posted by Azy View Post
you know, I saw the same as you described in the manual. I tried it out many times and it didn't work. but the way you said it, it works! thanks alot
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