# [GAMBIT] Face boundary in 2d

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 LinkBack Thread Tools Display Modes
July 10, 2013, 01:36
Face boundary in 2d
#1
Senior Member

Saeed
Join Date: Jan 2013
Posts: 177
Rep Power: 7
Hello.

I am modeling a 2d channel in Gambit. I have a face that air enters into the model. I am defining 5 edges for boundaries like wall and pressure inlet and pressure outlet and etc. But after defining the face for air, i can not export mesh for fluent. Is that possible to define face boundary in 2d model? see attached image ( Gambit error and geometry)

Thanks
Attached Images
 gambit error.jpg (24.4 KB, 10 views)

Last edited by flow_CH; July 12, 2013 at 01:41.

 July 10, 2013, 04:28 #2 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,358 Blog Entries: 6 Rep Power: 45 No you cannot define face as boundary condition for 2d case. Give pressure condition to two outermost edges instead of four.

July 10, 2013, 04:37
#3
Senior Member

Saeed
Join Date: Jan 2013
Posts: 177
Rep Power: 7
Quote:
 Originally Posted by Far No you cannot define face as boundary condition for 2d case. Give pressure condition to two outermost edges instead of four.
You mean i erase two wall boundary edges and define that to pressure inlet boundary? if yes, since we are not defining the wall boundary then is the flow going out of model?

 July 10, 2013, 04:47 #4 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,250 Rep Power: 34 don't set any BC to internal edge. As Far explained, assign pressure inlet to both outer edges. If you are running multiphase, you can use your air-face to initialise your vof. For that you need to assign your surface as another fluid domain __________________ In memory of my friend Hervé: CFD engineer & freerider

July 10, 2013, 04:50
#5
Senior Member

Saeed
Join Date: Jan 2013
Posts: 177
Rep Power: 7
Quote:
 Originally Posted by -mAx- don't set any BC to internal edge. As Far explained, assign pressure inlet to both outer edges. If you are running multiphase, you can use your air-face to initialise your vof. For that you need to assign your surface as another fluid domain
Yes. My model is multiphase. Can you explain more last sentence?
Thanks

 July 10, 2013, 04:53 #6 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,250 Rep Power: 34 __________________ In memory of my friend Hervé: CFD engineer & freerider

 July 10, 2013, 05:01 #7 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,358 Blog Entries: 6 Rep Power: 45 yes. Define that wall edges as pressure inlet

 July 12, 2013, 02:10 #8 Senior Member   Saeed Join Date: Jan 2013 Posts: 177 Rep Power: 7 I Defined that wall edges as pressure inlet and tested 2d in my model . But in 2d i could not simulate that because every time the flow arrive that boundary, solution is converged!!! and flow not going to outlet (downstream)!!!! Thanks Last edited by flow_CH; July 12, 2013 at 03:41.

 July 12, 2013, 03:29 #9 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,250 Rep Power: 34 sounds connectivity problem. can you post picture of velocity contour (with mesh) on this area? __________________ In memory of my friend Hervé: CFD engineer & freerider

July 12, 2013, 03:55
#10
Senior Member

Saeed
Join Date: Jan 2013
Posts: 177
Rep Power: 7
Quote:
 Originally Posted by -mAx- sounds connectivity problem. can you post picture of velocity contour (with mesh) on this area?
Thank you for your quick reply.
sounds connectivity problem? What is that?
I should say my continuity criteria for residuals is 0.001.
I will send pics for you in private.

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post bobburnquist OpenFOAM Native Meshers: snappyHexMesh and Others 6 August 26, 2015 09:38 Ganesh FLUENT 13 January 22, 2014 05:11 Mavier CFX 5 April 29, 2013 00:00 AlmostSurelyRob OpenFOAM 3 June 24, 2011 13:06 gaottino OpenFOAM Native Meshers: blockMesh 7 July 19, 2010 14:11

All times are GMT -4. The time now is 00:55.

 Contact Us - CFD Online - Privacy Statement - Top