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

modeling a turbulent flow over an obstacle using OpenFOAM

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 20, 2013, 13:27
Default modeling a turbulent flow over an obstacle using OpenFOAM
  #1
Senior Member
 
Daniel
Join Date: Mar 2013
Posts: 175
Rep Power: 9
Daniel_Khazaei will become famous soon enough
Hello foamers

I am trying to run my first turbulent case using OpenFOAM. However I have a few problems with pressure equation.

I have simulated the same case with fluent without any problems and pressure values are reasonable.

Now I want to run the same case with OpenFOAM. here is the details about the case:

- geometry: a channel consisting an obstacle

- inlet: velocityInlet

- outlet: pressureOutlet

I have also attached the case.

The main problem is very wrong calculation of pressure equation at beginning of the simulation, as you can see in the attachment. As you can see pressure values are very high. However, the final result (steady state solution) is in well agreement with fluent.

I have already checked other test cases of OpenFOAM and those cases do not have the same problem. Also fluent does not have this problem. So I am guessing that something is wrong with my case setup.

any help would be appreciated.

regards


you can download the case here: http://www.rodfile.com/3rv10ek2pkb4
Attached Images
File Type: jpg pressure#1.jpg (14.9 KB, 18 views)
Daniel_Khazaei is offline   Reply With Quote

Old   December 20, 2013, 20:49
Default
  #2
Senior Member
 
Daniel
Join Date: Mar 2013
Posts: 175
Rep Power: 9
Daniel_Khazaei will become famous soon enough
I have tried to simulate the case in laminar regime, but the problem is still there.
Daniel_Khazaei 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
CFX Treatment of Laminar and Turbulent Flows Jade M CFX 6 January 26, 2013 11:11
isotropic homogeneous turbulent flow field with OpenFoam Matthias89 OpenFOAM 2 February 5, 2012 08:26
Laminar flow or Turbulent flow mech FLUENT 0 January 27, 2007 19:51
laminar and turbulent flow in one simulation msna FLUENT 0 January 27, 2007 18:35
Reynolds and Turbulent Flow Frederic Dubinski Main CFD Forum 2 October 20, 2004 13:57


All times are GMT -4. The time now is 09:46.