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[ICEM] Problem with meshing half NACA0009 in 3D

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Old   May 16, 2012, 07:19
Default Problem with meshing half NACA0009 in 3D
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Hello!

I have a huge problem with meshing half NACA0009 profile fin. Previously I have done meshing only in 2D and now I face a problem with doing mesh in 3D. I done tetra mesh and tried to import it to Fluent, but with no result. There was an error message "Segmentation Voliation". I`m dealing with this problem for one week. If anybody could give me some hints or an advice, I would be grateful. Thanks in advance.

Screens of the problem:
http://pokazywarka.pl/cn51qj/
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Old   May 16, 2012, 07:36
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Can attach a ICEM project?
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Old   May 16, 2012, 08:21
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Yes, of course. This is only test one, so the mesh is very coarse. Here it is:
http://hostuje.net/file.php?id=c44e4...482051ae3e4ee8
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Old   May 16, 2012, 08:29
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This is only project file without geometry (*.tin) and blocking (*.blk).
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Old   May 16, 2012, 08:36
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As I said, I`m new here and I read that you would like to see the project .

http://hostuje.net/file.php?id=42652...ea0144113a8c2c
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Old   May 16, 2012, 09:00
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It's not so simple as in 2D. A similar example in the topic naca0012. I was just trying to mesh.
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Old   May 16, 2012, 09:03
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I know that. As I said, I stuck in this point and I can`t go forward ...
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Old   May 16, 2012, 09:07
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attach .tin file
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Old   May 16, 2012, 09:11
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http://hostuje.net/file.php?id=ab043...1630b427ca8f00
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Old   May 17, 2012, 06:13
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That's one of the variants of the mesh.
Attached Images
File Type: jpg naca0009.jpg (94.7 KB, 115 views)
Attached Files
File Type: zip 3D_FinTEST1.zip (44.2 KB, 25 views)
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Old   May 18, 2012, 11:22
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Thank you very much for that. Can you give me some explanation how you done that? I see some blockin, but I have only rough idea what`s going on there. Thank you in advance.

Best regards
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Old   May 21, 2012, 03:57
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1. Create 3D Block and split it as shown in pictures 1 & 2.
2. Create O-grid for area around wing as shown in picture 3.
3. Create O-grid for area inside wing as shown in picture 4.
4. Merge all vertices in thin blocks except six inside wing as shown in picture 5.
Attached Images
File Type: jpg naca0009_1.jpg (18.0 KB, 92 views)
File Type: jpg naca0009_2.jpg (20.3 KB, 85 views)
File Type: jpg naca0009_3.jpg (17.5 KB, 91 views)
File Type: jpg naca0009_4.jpg (12.5 KB, 81 views)
File Type: jpg naca0009_5.jpg (40.6 KB, 98 views)
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Last edited by Ralen; May 21, 2012 at 04:13.
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Old   May 21, 2012, 04:08
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5. Associate & move vertices as shown in pictures 6 & 7
6. Remove six blocks inside wing as shown in picture 8.
7. Associate faces of the wing to the surfaces of the wing ("FIN") as shown in picture 9
8. Align vertices along the z axis. Move vertices as shown in picture 10
Attached Images
File Type: jpg naca0009_6.jpg (25.5 KB, 86 views)
File Type: jpg naca0009_7.jpg (21.1 KB, 60 views)
File Type: jpg naca0009_8.jpg (18.7 KB, 58 views)
File Type: png naca0009_91.PNG (35.3 KB, 60 views)
File Type: jpg naca0009_10.jpg (37.5 KB, 56 views)
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Last edited by Ralen; May 21, 2012 at 06:02.
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Old   May 21, 2012, 04:12
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9. Set the size for the mesh. (I use the global size 20 and 2 for the curves of the wing). Move the vertices to improve a quality!
Attached Images
File Type: jpg naca0009_11.jpg (96.1 KB, 96 views)
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Old   May 21, 2012, 05:22
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Well done
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Old   May 21, 2012, 05:55
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You can also create the o-grid block along the axis Y before merge vertices.

Last edited by Ralen; May 21, 2012 at 07:06.
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Old   May 22, 2012, 05:22
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Thank you for that Ralen, that was very helpful. You are the man
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Old   June 1, 2012, 05:06
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I now doing 3D mesh for two fins, which are canted and toed in. In near future I`m going to do the mesh for 3 fins. I meet problems with assigning inner vertices (FIN1.png) to surface of the fin (FIN2.png). When I`m doing premesh, the software screams so error, and the mesh don`t have shape of the geometry.



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Old   June 1, 2012, 07:28
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i cannot see the pics
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Old   June 1, 2012, 07:53
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Zdjęcia

Here is the model:
http://hostuje.net/file.php?id=37000...709fbdbcbfebce
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