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

Interiour boundary condition

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 21, 2010, 15:07
Post Interiour boundary condition
  #1
New Member
 
Markus Trenker
Join Date: Feb 2010
Location: Vienna, Austria
Posts: 11
Rep Power: 8
maksen is on a distinguished road
Hi All,

Is there anything similiar to the "interiour" boundary condition of fluent in Openfoam?

I am using snappyhexmesh for the mesh generation and added an extra face to the original geometry for better controlling the mesh generation process. However when setting up the boundary file and subsequently all the other files for specifying the boundary conditions i have to deal with that "extra" face. I cannot set any boundary condition on it because it was only used for the mesh generation.

Up until now I couldn't find any bc for that in OF, so maybe some of you might know some kind of workaround...

cheers for your help,
markus
maksen is offline   Reply With Quote

Old   February 22, 2010, 10:13
Default
  #2
Super Moderator
 
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 9,554
Blog Entries: 39
Rep Power: 97
wyldckat is just really nicewyldckat is just really nicewyldckat is just really nicewyldckat is just really nicewyldckat is just really nice
Greetings maksen,

I've searched for that very same question and found this about a year ago, but never got around to test it

Additionally, in openfoamwiki.net, you have this old wiki page: "Howto importing fluent mesh with internal walls". Nonetheless, it's another thing I didn't get around to test either.

You could try groovyBC, which allows some special cases of boundary conditions, but it's just another one I've not tested yet.

Also, I know I read somewhere on this forum that it wasn't possible to define interior patches, but I might be outdated.

Best regards,
Bruno Santos
wyldckat is offline   Reply With Quote

Old   February 23, 2010, 05:34
Default
  #3
New Member
 
Markus Trenker
Join Date: Feb 2010
Location: Vienna, Austria
Posts: 11
Rep Power: 8
maksen is on a distinguished road
Hi Bruno,

thanks for those hints.... i'll give them a go asap and let you know....

cheers
Markus
maksen is offline   Reply With Quote

Old   March 8, 2010, 17:01
Default
  #4
New Member
 
Jason Ryon
Join Date: Oct 2009
Posts: 17
Rep Power: 8
jason.ryon is on a distinguished road
I am also trying to get "interior" patches from a Fluent mesh in OF. I looked at this howto about internal walls, and step 4 is:

Add for the internal wall a pair of empty patches (with zero length) in the <constant><polyMesh> section of your case:
wall_A
{
type wall;
startFace ;
nFaces 0;
}

wall_B
{
type wall;
startFace ;
nFaces 0;
}

What file do I add this to (i.e. polyMesh/boundary??) and what values do I use for startFace?
jason.ryon is offline   Reply With Quote

Old   March 9, 2010, 03:07
Default
  #5
New Member
 
Markus Trenker
Join Date: Feb 2010
Location: Vienna, Austria
Posts: 11
Rep Power: 8
maksen is on a distinguished road
Hi Jason,

yes, this goes in to the boundary file.. the startface number should be consistent with the original mesh.. i.e. the face number of the first face in the patch wall....

anyhow... i'm still not able to switch wall to interiour..tried a lot... no success so far... thinking of writing an interiour boundary condition myself if i find the time..

good luck!
markus
maksen is offline   Reply With Quote

Reply

Tags
boundary conditions, interiour faces

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
Boundary Conditions Thomas P. Abraham Main CFD Forum 20 July 7, 2013 05:05
Transient outlet boundary condition problem jwillie2000 CFX 1 December 7, 2009 18:07
Axis Boundary Condition..what is it? CFDtoy FLUENT 6 February 13, 2007 06:51
How to set boundary condition in Fluent for the fo Peiyong FLUENT 1 November 10, 2006 12:44
How to resolve boundary condition problem? sam FLUENT 2 July 20, 2003 02:19


All times are GMT -4. The time now is 06:15.