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

Problem with segment surface and meshing

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 12, 2011, 06:05
Default Problem with segment surface and meshing
  #1
New Member
 
Join Date: Oct 2010
Posts: 29
Rep Power: 6
Silmaril is on a distinguished road
I work with ICEM. I need to make several cylindrical holes in a spherical surface, so I have intersected the sphere with the cylinders obtaining the intersecting curves. After that I segment the sphere through the curves. At that point some of the segmentations get wrong: or didn't work at all or segment the surfaces but not exactly along the curve, with some little errors.

How can I solve this problem? is there some setting that influence the segmentation?

The problem rises when I have to mesh the model: in the holes that didn't segment exactly along the curve (even if the geometric difference should be neglected) the boundary curve itself was segmented in many sub-curves (some of them very tiny).
When the code try to get the tetra mesh, many highly deformed triangles are formed near such curves (with the edge on the sub-curve very small while the others much bigger, taking the imposed mesh size from the surrounding surface).

How can I fix this problem? even if I cannot fix the segment issue, is there a way to impose the meshing so that I can make the code to forget about those tiny sub-curves?

Thanks for the help

Silmaril
Silmaril is offline   Reply With Quote

Old   October 13, 2011, 17:42
Default Tri-tolerance
  #2
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,651
Blog Entries: 1
Rep Power: 34
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
A number of the geometry commands (such as create intersection curve or segment by curve) are very sensitive to the tri-tolerance of the model. I suggest refining the tri-tolerance and then trying again...

Search the Help for more info...

Best regards,

Simon
__________________
-----------------------------------------
Please help guide development at ANSYS by filling in these surveys

Public ANSYS ICEM CFD Users Survey

This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)...

CFD Online Users Survey
PSYMN 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
[GAMBIT] 3D boundary layer and meshing problem in GAMBIT 2.4.6 prashanthreddyh ANSYS Meshing & Geometry 1 December 20, 2011 01:35
Meshing problem Andrea_85 OpenFOAM 1 January 13, 2011 10:36
Error : Self intersecting surface mesh, computing intersections & Error : Impossible velan Open Source Meshers: Gmsh, Netgen, CGNS, ... 0 June 29, 2009 01:48
POROUS SURFACE MESHING PROBLEM subramani.j CD-adapco 1 March 3, 2004 05:45
GAMBIT meshing problem Gauthier Lambert Main CFD Forum 1 August 3, 2000 10:22


All times are GMT -4. The time now is 09:36.