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

spatial non uniform boundary conditions

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 26, 2012, 10:53
Default spatial non uniform boundary conditions
  #1
New Member
 
Join Date: Apr 2011
Posts: 28
Rep Power: 6
pepe.aero is on a distinguished road
Hi all,

i'm looking for the proper way in order to assign spatially non-uniform boundary condition at the inflow side. For example, a parabolic velocity profile varying along z (vertical) axis.
The condition is steady in time.
Can anyone give me a suggestion about what is the best type of BCs to choose in order to do it?

Thanks all for the support.

Regards,

Andrea
pepe.aero is offline   Reply With Quote

Old   October 29, 2012, 04:34
Default
  #2
ngj
Senior Member
 
Niels Gjoel Jacobsen
Join Date: Mar 2009
Location: Deltares, Delft, The Netherlands
Posts: 1,619
Rep Power: 25
ngj will become famous soon enoughngj will become famous soon enough
Hi Andrea,

In that case, I would suggest that you start by looking at swak4Foam, where you can specify e.g. algebraic expressions: http://openfoamwiki.net/index.php/Contrib/swak4Foam .

If you search for swak4Foam on the forum, you will find many threads describing its usage.

Kind regards,

Niels
ngj is offline   Reply With Quote

Old   October 29, 2012, 13:42
Default
  #3
New Member
 
Join Date: Apr 2011
Posts: 28
Rep Power: 6
pepe.aero is on a distinguished road
Hi Niels,

thank you for your reply.
In fact, I'm taking a look to skaw4foam...but it's not clear to me if is possible to assign non uniform condition by points (and then the solver interpolates the velocity profile in the missing points) or just by algebrical expressions.
Can you answer to this question?

Thanks you so much for your support.

Regards,

Andrea
pepe.aero is offline   Reply With Quote

Old   October 29, 2012, 15:41
Default
  #4
ngj
Senior Member
 
Niels Gjoel Jacobsen
Join Date: Mar 2009
Location: Deltares, Delft, The Netherlands
Posts: 1,619
Rep Power: 25
ngj will become famous soon enoughngj will become famous soon enough
Hi Andrea,

No, I have never used swak4Foam.

Good luck,

Niels
ngj is offline   Reply With Quote

Old   November 12, 2012, 10:29
Default
  #5
Member
 
Duong A. Hoang
Join Date: Apr 2009
Location: Delft, Netherlands
Posts: 92
Rep Power: 8
duongquaphim is on a distinguished road
Send a message via Yahoo to duongquaphim
I think groovyBC is quite a good tool for this purpose (http://openfoamwiki.net/index.php/Contrib_groovyBC). I used that before and it works well.

Duong
duongquaphim is offline   Reply With Quote

Reply

Tags
boundary condition, non uniform, parabolic inlet, spatial, type

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
How to set uniform heating boundary condition? Sargam05 OpenFOAM 0 September 11, 2012 10:09
Need help with boundary conditions: open to atmosphere Wolle OpenFOAM 2 April 11, 2011 07:32
Pressure instability with rhoSimpleFoam daniel_mills OpenFOAM Running, Solving & CFD 44 February 17, 2011 18:08
Boundary condition setting for non-premixed combustion using reactingFoam skyopener OpenFOAM 0 May 23, 2010 22:55
A problem about setting boundary conditions lyang Main CFD Forum 0 September 19, 1999 18:29


All times are GMT -4. The time now is 06:31.