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

[ICEM] Icem 12.1, O-grid - sweep combination

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 14, 2010, 03:56
Default Icem 12.1, O-grid - sweep combination
  #1
New Member
 
Join Date: Jul 2009
Posts: 8
Rep Power: 16
pertupd is on a distinguished road
Hi all,
I am trying to mesh quarter pipe (perforated on perimeter) making use of quarter O-grid blocking (in Hexa).
I would like to save some finite volumes and would like to use two sweet blocking direction in central part of the pipe.

First sweep block direction is along perimeter of the pipe, and is utilized to reduce no. of volumes in axial direction.
The second sweep, in most central part of the pipe, is to reduce no. of volumes in cross section of the pipe.

Problem is that icem, when generating mesh (project to survace), is trying to project face in the middle of the first sweep blocking to nearest surface and thus producing non-regular grid on the face. Icem treat the face as if it was boundary face, but in fact it is interior one. It does not help to disassociate edges of the face.

The only cure is to generate mesh projecting to edges only. But in general, it is not a solution. See attached pics. of resulting mesh in the first sweep middle face for the two projection setings.

How to impell Icem to treat the face as interior one?

hex_o_sweep_proj_surf.jpg

hex_o_sweep_proj_curv.jpg

Partial solution to the problem is to generate the quarter O-grid by hand (not using automatic O-grid split) and generating central block by hand.
In the case the middle face of the first sweep do not look to be treated as boundary. Though there is some problem when generating overall mesh. The mesh is not generated for the cental part (second sweep) and resulting mesh is only surface mesh.
What might happen in the case?

Thanks for every suggestion.
pertupd is offline   Reply With Quote

Old   June 18, 2010, 15:00
Default Different volume parts?
  #2
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,663
Blog Entries: 1
Rep Power: 47
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
Usually, if ICEM Hexa is trying to project an internal face to surface, it is because the blocks on either side of that face are in different volume parts so it assumes a boundary.

You can fix these issues generally (all the faces between any two volumes) or face by face using the Associate Face to Surface DEZ... Or you could just make sure that the blocks are in the same volume part.
PSYMN is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
On grid independent solution for pulsatile flow David FLUENT 5 March 25, 2022 04:33
Exporting ICEM Tetra Grid to Fluent with Hexa-Core Tim FLUENT 2 August 30, 2007 08:16
ICEM HEXA Grid Manish Phoenics 0 March 12, 2005 06:07
Combustion Convergence problems Art Stretton Phoenics 5 April 2, 2002 06:59
Grid Independent Solution Chuck Leakeas Main CFD Forum 2 May 26, 2000 12:18


All times are GMT -4. The time now is 05:32.