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-   -   [ICEM] 3D pipe with elliptical cross section (http://www.cfd-online.com/Forums/ansys-meshing/101906-3d-pipe-elliptical-cross-section.html)

wind.cfd May 16, 2012 18:52

3D pipe with elliptical cross section
 
Hi,
I want to create the pipe with elliptical area surface in ICEM and mesh through this geometry. Actually, I am new user of this software, is there anyone can help me generating this model.

Tnx in advance

Far May 17, 2012 03:56

Could you draw the rough sketch?

Like this ? http://www.google.com.pk/imgres?q=pi...3&tx=101&ty=76

http://www.google.com.pk/imgres?q=pi...9,r:8,s:0,i:86

Far May 17, 2012 04:01

http://www.handymath.com/cgi-bin/ell...i?submit=Entry

wind.cfd May 17, 2012 19:47

Actually not, I am really beginner in Icem, how can I draw that sketch?

Far May 18, 2012 07:57

1 Attachment(s)
here it is

http://img9.imageshack.us/img9/5127/...ticalpipe1.png
http://img444.imageshack.us/img444/1...ticalpipe2.png

Far May 18, 2012 09:58

Youtube video tutorial
 
Here is the link to youtube video tutorial for the same case.

http://www.youtube.com/watch?v=IHh0b...ature=youtu.be

wind.cfd May 18, 2012 16:34

thank you so much for your complete explanation

Actually I am looking to create the geometry like the attached image and the mesh like it. could you tell me more about how can I create this geometry and if I want to create the mesh same as attached photo I can follow your tutorial or the other way?

Thanks in advance

Far May 18, 2012 16:42

Quote:

Actually I am looking to create the geometry like the attached image and the mesh like it. could you tell me more about how can I create this geometry and if I want to create the mesh same as attached photo I can follow your tutorial or the other way?
You can create the geometry with the equation of ellipse and and draw those points and then curves here. I wish, ICEM had the button to create directly the ellipse with major and minor axis. Alternatively this can be done in design modeller.

Quote:

if I want to create the mesh same as attached photo I can follow your tutorial or the other way?
You can easily follow my tutorial to make mesh for this or similar models. There may be other methods to mesh this geometry, which may be better than this one. But frankly speaking I didn't try.

wind.cfd May 18, 2012 16:48

1 Attachment(s)
that's the image I want to generate ;)

Far May 18, 2012 16:49

Use gambit or design modeller to design this geometry. Or use CAD software like Catia

wind.cfd May 18, 2012 17:07

I want to create the oval surface in gambit and import it into ICEM and after that complete the geometry and mesh in ICEM. I have these following question:
1- How can I import the .dbs file from gambit to ICEM?
2- is it possible I just create the oval surface in gambit and export it into ICEM and after that I complete the whole model in ICEM?
3- If I want to create the equal-size mesh in the pipe, I have to block it like your tutorial?

Thank you so much my friend

Far May 18, 2012 17:12

Quote:

1- How can I import the .dbs file from gambit to ICEM?
Not possible

Quote:

2- is it possible I just create the oval surface in gambit and export it into ICEM and after that I complete the whole model in ICEM?
Yes. create surface mesh on it and then output this mesh in generic form (.nue) and open this file in excel and copy points (x,y, z coordinates) and past into .dat file. Now you can open this file in ICEM.

Quote:

3- If I want to create the equal-size mesh in the pipe, I have to block it like your tutorial?
Yes

alimrad110 June 29, 2012 10:22

Hi Guys,

I have a problem very similar to the problem here but in my case the elliptical pipe is connected to a cylindrical pipe. I can mesh each one individually but when I want to get the connection between the two pipes everything falls apart! I think my associations are faulty but I have no idea what to do! The main problem is that the connectivity of the cylindrical and elliptical pipes is only at one point on the two curves, i.e. they are not sharing any curves on the plane where they connect. Also the major axis of the ellipse is the same as pipe diameter.

I'm only an intermediate ICEM user, may be more advanced guys have an idea how to do it. :confused:

Thanks

Far June 29, 2012 10:32

sharing project files, would get you the quick response

alimrad110 June 29, 2012 10:39

I will get them for you within an hour,

Regards

alimrad110 June 29, 2012 11:44

1 Attachment(s)
Hi,

here is the original IGES file in a zip format,

there is another pipe that connects to the elliptical port which I drew in ICEM (it's an internal flow problem), since it was easier.

If you need my actual ICEM files, let me know so I can get them to you ASAP,

I have huge problems with the chamfer and the connection between the elliptical port and the pipe.

Thank you for your help,
Really appreciate it,

Best Regards,
Ali

Far June 29, 2012 11:51

Quote:

Originally Posted by alimrad110 (Post 368933)
If you need my actual ICEM files, let me know so I can get them to you ASAP
Ali

It is always a good idea to send ICEM files

alimrad110 June 29, 2012 13:35

1 Attachment(s)
The ICEM Files are attached here,

I deleted my associations but left my blocking so you can see my approach.

Thanks for the help,
Ali

alimrad110 July 14, 2012 12:26

Dear Far,

I was wondering if you had time to take a look at this problem, I still haven't managed to get a mesh with an acceptable quality, never mind good quality from this geometry.

Regards,
Ali


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