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

Subsonic inflow issues possible bug please help

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 24, 2008, 09:25
Default Hello I have some code that
  #1
Member
 
srinath
Join Date: Mar 2009
Location: Champaign, USA
Posts: 91
Rep Power: 17
srinath is on a distinguished road
Hello
I have some code that worked in OpenFoam-1.4.1 , but i can't seem to get it working on rhoCentralFoam.

I am running a very simple test
1)Geometry is just a rectangular channel.
2)If i specify all variables at inlet(as in supersonic inflow), and extrapolate all values(as in supersonic outlet), everything is fine. As expected there is no change in any flow parameters
3)If i change the bc's to subsonic inflow and outflow, all hell breaks lose.
I specify p,T on inlet. U is computed at inlet using the keyword pressureInletVelocity,
At outlet i specify p and extrapolate T,U using the zeroGradient keyword.

However even in such a simple case i get a floating point exception from sqrt

Could some one tell me what i am doing wrong?
Or is this a bug?

I have been looking at this for the last 3 days, with no results

Thanks
Srinath
srinath is offline   Reply With Quote

Reply


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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
CFX for low subsonic regime sa CFX 2 January 12, 2009 07:36
Subsonic Inflow/Outflow Boundarty Conditions Ruben Main CFD Forum 9 June 1, 2006 04:00
subsonic flow anitha Main CFD Forum 4 March 16, 2006 09:59
Subsonic-supersonic nozzle Edvaldo CFX 1 February 4, 2005 03:40
how to calculate subsonic misssile james FLUENT 2 September 17, 2004 01:32


All times are GMT -4. The time now is 00:52.