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

Symmetry and Empty BC

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 22, 2015, 03:34
Default Symmetry and Empty BC
  #1
New Member
 
James F.
Join Date: May 2015
Posts: 24
Rep Power: 2
NoradFirst2 is an unknown quantity at this point
Hi Foamers,

I have a question about symmetry in OF.

Let's imagine a case with two identical air jets blowing along one axis and in opposite direction.

---> <---

There is a symmetry plane on this little drawing. Can I only mesh the left half of it and use an empty BC for the symmetry plane? Or maybe if I do so the simulation won't suceed?

My geometry is more complex and I'd like to simplify it but I have air jets blowing in every directions...

Thanks for helping.
NoradFirst2 is offline   Reply With Quote

Old   July 22, 2015, 04:30
Default
  #2
Senior Member
 
anonymous
Join Date: Aug 2014
Posts: 198
Rep Power: 4
ssss is on a distinguished road
Use the symmetryPlane BC
ssss is offline   Reply With Quote

Old   July 22, 2015, 04:49
Default
  #3
New Member
 
James F.
Join Date: May 2015
Posts: 24
Rep Power: 2
NoradFirst2 is an unknown quantity at this point
Ok thanks!

If I have this drawing (with --> being an air jet)

<-- --> <-- --> <-- --> <-- --> <-- -->

Let's say I only represent:

<-- -->

with two symmetry planes, one on each side. Should I have two groups : leftSide and rightSide, each group with the BC "symmetryPlane" or can I have only one group with the two sides in it and one BC?

Thanks!

Last edited by NoradFirst2; July 22, 2015 at 08:35.
NoradFirst2 is offline   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
Drag force coefficient too high for a flow past a cylinder using komega sst Scabbard OpenFOAM Running, Solving & CFD 37 March 21, 2016 17:16
stressedFoam with wall motion looses symmetry and does not converge gtg258f OpenFOAM 1 June 6, 2012 12:28
pipe flow with heat transfer Fabian OpenFOAM 2 December 12, 2009 05:53
pipe with buoyantFoam buoyancy, boundary conditions Thomas Baumann OpenFOAM 0 June 15, 2009 08:58
the difference profile in the empty domain justin Main CFD Forum 1 August 25, 2006 06:32


All times are GMT -4. The time now is 08:23.