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

Incompressible boussiesq flow pressure BC piso and continuity problems

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 8, 2007, 05:25
Default to whom it may interest: Fi
  #1
Senior Member
 
Thomas Jung
Join Date: Mar 2009
Posts: 100
Rep Power: 8
tehache is on a distinguished road
to whom it may interest:

Figured out that the problems where due to wrong fluxes calculated in peqn.flux() from the gradients at my pressure B.C.
I changed gradientInternalCoeffs() and gradientBoundaryCoeffs() in my B.C. to return 0, now everything is fine.
tehache is offline   Reply With Quote

Old   September 24, 2008, 06:57
Default Thomas, Can you upload you
  #2
New Member
 
Niranjan Ghaisas
Join Date: Mar 2009
Location: Pune, Maharashtra, India
Posts: 10
Rep Power: 8
nsghaisas is on a distinguished road
Thomas,

Can you upload your boussinesq solver? I am facing the same problem which you had mentioned. I can try the things you have mentioned in the subsequent post in order to fix the problems, but with not much background in C++ and OpenFOAM, it will not be that easy for me. Your boussinesq solver will sureley be a great help.

Many Thanks

Niranjan
nsghaisas is offline   Reply With Quote

Old   September 24, 2008, 10:31
Default Niranjan, I will have a loo
  #3
Senior Member
 
Thomas Jung
Join Date: Mar 2009
Posts: 100
Rep Power: 8
tehache is on a distinguished road
Niranjan,

I will have a look at the solver, clean up a little, and can upload it hopefully next week.

No warranty, though
tehache is offline   Reply With Quote

Old   November 6, 2008, 02:08
Default Hi Thomas Any luck with get
  #4
New Member
 
Niranjan Ghaisas
Join Date: Mar 2009
Location: Pune, Maharashtra, India
Posts: 10
Rep Power: 8
nsghaisas is on a distinguished road
Hi Thomas

Any luck with getting that solver? In the meanwhile, I have gained some familiarity with C++ and OpenFoam and can now try to do the things you have mentioned. It would be of great help if you could answer a few of my queries.

I cant find wallBuoyantPressure BC. Is it that the BC was there in OpenFOAM 1.3, but has been removed from future versions? I am using 1.4 and there is a fixedFluxBuoyantPressure BC in 1.4.

Could you give me some pointers regarding how to go about building that new boundary condition? Also, what does the existing fixedFluxBuoyantPressure BC do?

Thanks for your time.

Niranjan
nsghaisas is offline   Reply With Quote

Old   November 6, 2008, 04:08
Default Niranjan, sorry for promisi
  #5
Senior Member
 
Thomas Jung
Join Date: Mar 2009
Posts: 100
Rep Power: 8
tehache is on a distinguished road
Niranjan,

sorry for promising too much. I am too busy with other stuff currently, hope to find time to get back to OpenFOAM in December, and then will need to learn and adapt my stuff to OpenFoam 1.5 first. I cant help you, for the moment.
tehache 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
PEqnflux in compressible and incompressible PISO loop dbxmcf OpenFOAM Running, Solving & CFD 1 July 11, 2015 15:21
pressure outlet BC for incompressible flow khaiching Main CFD Forum 6 October 15, 2005 02:58
pressure inlet in incompressible flow dirk FLUENT 2 June 22, 2005 13:27
Implicit scheme for incompressible flow problems Triton Main CFD Forum 4 August 25, 2002 04:54
incompressible flow - prescribing pressure drop - how best to do it? M. Gerritsen Main CFD Forum 4 January 10, 1999 10:53


All times are GMT -4. The time now is 21:26.