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

Natural Convection using Compressible Flow (chtMultiRegionFOAM)

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 22, 2010, 03:32
Default Natural Convection using Compressible Flow (chtMultiRegionFOAM)
  #1
Member
 
MSarkar
Join Date: Dec 2009
Posts: 99
Rep Power: 16
msarkar is on a distinguished road
Hello Foamers,

I need to model conjugate heat transfer where natural convection occurs within the fluid region. I found only chtMultiRegionFoam can handle this type of problem without any modification to the source code. I know that there are two ways of dealing with buoyancy (natural convection): full compressible treatment and the Boussinesq
approximation.
In my simulation, temperature variation is not much (maximum difference = 50). I was thinking of using incompressible flow assumption with Boussinesq approximation instead of compressible flow but unfortunately there is no conjugate heat transfer solver with incompressible flow. Anyone has any idea how will it effect the results if I use compressible flow instead incompressible flow with Boussinesq assumption? Will it give better results? Any comments would be helpful.

Thanks!
M. Sarkar
msarkar is offline   Reply With Quote

Old   July 30, 2010, 07:11
Default
  #2
Member
 
MSarkar
Join Date: Dec 2009
Posts: 99
Rep Power: 16
msarkar is on a distinguished road
I think compressible model will be more appropriate but Boussinesq model will be more stable. Moreover, compressible model will be computationally extensive. If I am wrong, please correct me. I did not find any relevant reference for buoyant flow modelling using compressible fluid. If any reference is known to anyone, please let me know. Any comments would be appreciated.

Regards
M. Sarkar
msarkar is offline   Reply With Quote

Old   September 7, 2010, 01:13
Default
  #3
Member
 
Robert Ong
Join Date: Aug 2010
Posts: 86
Rep Power: 15
rob3rt 0ng is on a distinguished road
Hi MSarkar,

I am too thinking of combining incompressible flow with radiative heat transfer, however, so far in the forum I couldn't find anything useful for a starting point. Could you please tell me a little bit of what you did since the last time you posted in this post? I am using porousSimpleFoam (incompressible) solver.

Thank you and kind regards,
Robert
rob3rt 0ng is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Compressible flow, no data at the outlet mireis FLUENT 6 September 3, 2015 03:10
help with compressible flow BC's (need subsonic flow) meangreen Main CFD Forum 5 July 24, 2010 14:16
compressible flow maria teresa FLUENT 1 September 7, 2007 17:58
natural convection rachid FLUENT 5 September 20, 2005 15:43
compressible channel flow.. R.D.Prabhu Main CFD Forum 0 July 17, 1998 18:23


All times are GMT -4. The time now is 07:45.