CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CD-adapco

Crack problems

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 5, 2008, 09:05
Default Crack problems
  #1
Sara
Guest
 
Posts: n/a
Hello everybody.

I'm a begginer with Starcd and I want to know how to solve crack problems. I tried to refine my geometry and after I had crack problems and I don't know how to solve it.

regards
  Reply With Quote

Old   August 5, 2008, 10:28
Default Re: Crack problems
  #2
ab
Guest
 
Posts: n/a
If you refine your model with CMREFINE instead of CREFINE it will not create cracks. Check the help on how to use CMREFINE, it is quite different.
  Reply With Quote

Old   August 6, 2008, 04:23
Default Re: Crack problems
  #3
Sara
Guest
 
Posts: n/a
thank you for your help but I still have cracks
  Reply With Quote

Old   August 6, 2008, 12:18
Default Re: Crack problems
  #4
Tom
Guest
 
Posts: n/a
You did not mention the version of STAR-CD you are using or the size of the object you are trying to mesh. Here are a couple of things that have worked for me (may not work for you in this case): 1. If the object you are meshing is small, the subsurface layer and other parts may be within the tolerances of the mesher. Therefore use VSCALE to increase the size. You can then scale it back down during the geometry write or after it is built successfully use VSCALE again. 2. Some problems arise because when the subsurface is built it writes its own lines and points. If they don't over lie the models lines and points exactly it will cause cracks. A step I always use is after the subsurface is built I delete the lines and points associated with the subsurface.

I am not sure these will work for you. However, if you want to see just what a pain they are do a search on this board on cracks and you will see long discussions on attempts to repair them.

Tom
  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
Crack error in STAR-CD Sachin CD-adapco 3 April 17, 2008 01:13
found crack in prostar but no crack in CCM+ ?? Ingear CD-adapco 4 October 23, 2006 09:37
crack in sector mesh escapist CD-adapco 2 May 19, 2005 07:25
How to crack this problem Lee CD-adapco 2 September 12, 2003 10:40
Crack problems again Carlos Saraiva CD-adapco 2 January 31, 2003 05:12


All times are GMT -4. The time now is 02:06.