CFD Online Logo CFD Online URL
Home > Forums > ANSYS Meshing & Geometry

[Icem]Icem CFD gets stuck while " disconnecting orphan cells "

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

Like Tree1Likes
  • 1 Post By diamondx

LinkBack Thread Tools Display Modes
Old   September 26, 2009, 15:15
Default [Icem]Icem CFD gets stuck while " disconnecting orphan cells "
New Member
Join Date: Mar 2009
Posts: 10
Rep Power: 10
jntan is on a distinguished road
Anyone has this problem? This always happens when I'm using auto tet meshing and use existing surface mesh as input to generate volume mesh. I'm sure this is not the computer RAM problem because the mesh quantity is only 900,000 and I have 4GB RAM and GForce 9600 512MB graphic card.
jntan is offline   Reply With Quote

Old   October 12, 2009, 15:05
Default Bottom up...
Retired from CFD Online
PSYMN's Avatar
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,665
Blog Entries: 1
Rep Power: 39
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
If you have a closed surface mesh, then change the Tetra method to Delaunay or Advancing front or something like that to generate a volume mesh from existing mesh.

The Octree with the option to "Use Existing Mesh" is really mean for just a few locations of existing mesh.

Behind the scenes, it generates a full mesh and then tries to make that mesh consistent with the existing mesh... It was not meant to be used this way and will be much much slower than the Delaunay or Advancing front methods.
PSYMN is offline   Reply With Quote

Old   September 30, 2010, 08:40
Default baffle
matteo lombardi
Join Date: Apr 2009
Posts: 67
Rep Power: 10
matteoL is on a distinguished road
I am having the same issue of the post: disconnecting orphan cells takes ages.
Unfortunately my geometry is a a box (already surface meshed) and an internal wall ,( i.e. a baffle in the middle) and it seems that that onlt the octree methid manage to mesh it... all other meshers (bottom up) fail because they say that there are single edges (of course there are, it is a baffle and i cannot split it (with split internal wall) before having created the volume mesh...)..

What should i do?

matteoL is offline   Reply With Quote

Old   December 4, 2014, 04:34
Chris_321's Avatar
Join Date: Sep 2013
Location: Germany
Posts: 88
Rep Power: 6
Chris_321 is on a distinguished road
I have the same problem.

Can someone explain how i can compute a delauny mesh without having a octree mesh first? If i try to do this it just creates "subsets" and delete my surface mesh.
Chris_321 is offline   Reply With Quote

Old   December 4, 2014, 10:15
Super Moderator
diamondx's Avatar
Ghazlani M. Ali
Join Date: May 2011
Location: Tokyo, Japan
Posts: 1,384
Blog Entries: 23
Rep Power: 22
diamondx will become famous soon enough
You don't need an octree mesh to generate a delaunay mesh , but you definitely need a surface mesh at least. Delaunay starts and grows from surface mesh...
PSYMN likes this.
New to ICEM CFD, try this document -->
diamondx is offline   Reply With Quote


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
STAR-Works : Mainstream CAD with CFD CD adapco Group Marketing Siemens 0 February 13, 2002 13:23
CFD Symposium (Call for Papers) Chris R. Kleijn Main CFD Forum 0 October 5, 1998 10:25
ASME CFD Symposium - Call for Papers Chris R. Kleijn Main CFD Forum 0 September 8, 1998 08:19
ASME CFD Symposium - Call for Papers Chris R. Kleijn Main CFD Forum 0 September 3, 1998 08:45
salary range Frank Muldoon Main CFD Forum 7 August 3, 1998 19:04

All times are GMT -4. The time now is 21:31.