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

Handling Virtual volumes in Gambit

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 29, 2006, 12:50
Default Handling Virtual volumes in Gambit
  #1
Bharath
Guest
 
Posts: n/a
Hi Fluent and Gambit users,

I have an issue with gambit. I am trying to convert a virtual volume to real volume in gambit. I have an STL file produced by other software that I input into gambit to carry out subsequent grid operations. The problem I have at the first place is that gambit recognizes the STL input file as a virtual volume and not as a real volume. This is not desirable, as I cannot carry out volume subtraction and splitting operation that is a necessary step before I proceed further.

Any suggestion to overcome this problem is welcome.

Thanks

  Reply With Quote

Old   October 29, 2006, 23:34
Default Re: Handling Virtual volumes in Gambit
  #2
sach
Guest
 
Posts: n/a
Bharat, I have not used stl format many times but one thing is sure when you transfer ant cad file to gambit or any mesher you have th eoption of real or virtual geometry transfer. if it is not available with stl o the following to get the real from virtual 1) delete all voulme keeping faces (lower topology on) 2) delete virtual fases keeping lower geom on and the lower geometry also consists real faces 3) hide the real faces and delete the v curves and points 3) creat volume from real facses

this will work if stl gives you geometry history

let me know if this work for you
  Reply With Quote

Old   October 30, 2006, 09:11
Default Re: Handling Virtual volumes in Gambit
  #3
Jason
Guest
 
Posts: n/a
If you have the option, go back to the original software and try an IGES or STP file. If you don't have that option, then try what Sach recommended.

Good luck, Jason
  Reply With Quote

Old   October 30, 2006, 20:44
Default Re: Handling Virtual volumes in Gambit
  #4
Bharath
Guest
 
Posts: n/a
Thanks very much.I had exactly tried that option but is very tediuous. Each of my volumes has more than 5000 volumes and forming the real faces in place of virtual faces is very tedious. Also, the automatic conversion in gambit is not very efficient if the grid is arbirarily shaped, meaning, the standrd conversion operation does convert only a small fraction of the available virtual faces.
  Reply With Quote

Old   October 30, 2006, 21:24
Default Re: Handling Virtual volumes in Gambit
  #5
Andrew Berner
Guest
 
Posts: n/a
Find a different format to convert the STL file to... Parasolid is pretty bulletproof in my experience.

Andy
  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
Problem with Volumes Gambit Danath ANSYS 1 October 19, 2011 08:20
Virtual volumes Mohsin FLUENT 2 March 24, 2010 03:32
Gambit - Virtual Geometries (Pro's & Con's) James Date FLUENT 3 August 11, 2003 15:46
Ghosts Volumes on Gambit ?!! help please Andres D. Ortiz FLUENT 0 October 7, 2001 19:17
Gambit mesh & Negative Volumes Ashutosh FLUENT 5 February 21, 2001 01:59


All times are GMT -4. The time now is 16:19.