CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

[ANSYS Meshing] helical meshing problems

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   April 30, 2012, 12:39
Default helical meshing problems
  #1
New Member
 
DJ
Join Date: Apr 2012
Posts: 3
Rep Power: 4
djelgan is on a distinguished road
I am trying to model heat transfer from a coil to surrounding air using Ansys Fluent v14. The coil body meshes fine with a hex sweep and the surrounding fluid body seems to mesh best with a tetrahedron patch conforming method.

The problem is the boundary between the hex coil mesh and the tet fluid mesh gives poor results. When I look at the results of a tetrahedrons mesh connecting face on the coil, I find that it is very poor and I have tried many different methods and adjustments with no luck on fishing the problem.

To see what I mean, look at the following screen shot of the face of the helical coil meshed with tetrahedrons, Initially there is a fine tet mesh, then it becomes course and I can't figure out why. Any help to improve this mesh would be appreciated.



Attached is the geometry file for anybody who wants to look at it.
Attached Images
File Type: jpg bad coil mesh.jpg (85.0 KB, 18 views)
Attached Files
File Type: zip coil-and-tube.zip (48.0 KB, 6 views)

Last edited by djelgan; April 30, 2012 at 15:26.
djelgan is offline   Reply With Quote

Old   April 30, 2012, 16:38
Default
  #2
Super Moderator
 
diamondx's Avatar
 
Ghazlani M. Ali
Join Date: May 2011
Location: Canada
Posts: 1,215
Blog Entries: 22
Rep Power: 18
diamondx will become famous soon enough
Send a message via MSN to diamondx
you attached coil-and-tupe.agdb alone. there is a file that comes with it and it has the same name. otherwise i can't open your geometry
__________________
Regards,
New to ICEM CFD, try this document --> http://goo.gl/G2gkE
Ali
diamondx is offline   Reply With Quote

Old   April 30, 2012, 16:51
Default
  #3
New Member
 
DJ
Join Date: Apr 2012
Posts: 3
Rep Power: 4
djelgan is on a distinguished road
When I export a geometry from Ansys Design Modeler (or just save it) it creates a single .agdb file which I have had no problem opening on different computers. Are you opening it using a version other than v14? I have realized that once saved using a newer version, the older version will no longer open it.

I have attached it again as an .igs file which should have no problems being opened.
Attached Files
File Type: zip coil.zip (43.9 KB, 9 views)
djelgan is offline   Reply With Quote

Old   May 16, 2012, 19:11
Default
  #4
New Member
 
DJ
Join Date: Apr 2012
Posts: 3
Rep Power: 4
djelgan is on a distinguished road
anybody else have an idea why this is meshing weird?
djelgan is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Problems of Icem meshing about Conical Forebody raja2010 ANSYS Meshing & Geometry 2 December 6, 2010 09:20
Problems meshing a pipe U.Golling OpenFOAM Native Meshers: snappyHexMesh and Others 2 November 30, 2010 05:24
[ICEM] Hexa Meshing a helical profile Balakrshnan Ramakrishnan ANSYS Meshing & Geometry 1 August 24, 2010 10:53
Meshing problems using Gambit Vianney FLUENT 4 May 30, 2009 03:45
3D meshing of helical wire wrapping DINESH FLUENT 0 April 3, 2003 06:14


All times are GMT -4. The time now is 03:30.