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

Heat transfer trough an internal wall

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 5, 2010, 03:14
Default Heat transfer trough an internal wall
  #1
New Member
 
Anke
Join Date: Mar 2009
Location: Germany
Posts: 9
Rep Power: 8
anke is on a distinguished road
Hello,

I'm looking for a possibility to model the following problem.
I have an internal wall between to rooms. There is no pressure and velocity exchange between the rooms, only heat transfer.

The wall can be modulated with zero-thickness.

thr solver shoul be buoyantSimpleRadiationFoam because I have a Radiation source in one room.

I'm not sure If a have to define the the internal wall as patch and how the initial conditions , especially for the Temparture should look like.

Greetings

Anke
anke is offline   Reply With Quote

Old   March 5, 2010, 06:24
Default
  #2
Member
 
David
Join Date: Dec 2009
Location: Spain
Posts: 58
Rep Power: 7
David_010 is on a distinguished road
Hi anke

I think you should create a wall with thickness, defined as solid, with the appropriate thermal conductivity. Then the heat flux between the two rooms will be calculated. I think you can't fix it through a boundary condition. I don't have experience with turbulent models and I don't know if you need to specify the heat transfer coeff on the walls, but I think this is the correct way at least for laminar.

I hope it help you

Regards

David
David_010 is offline   Reply With Quote

Old   March 5, 2010, 06:32
Default
  #3
New Member
 
Anke
Join Date: Mar 2009
Location: Germany
Posts: 9
Rep Power: 8
anke is on a distinguished road
Hello David,

thanks for your help.
If I use a wall with thickness, do I have to use the chtMultiRegionFoam-Solver?

That would be a Problem, because this solver does not have a Radiationmodel.

Greetings

Anke
anke is offline   Reply With Quote

Old   March 5, 2010, 06:57
Default
  #4
Member
 
David
Join Date: Dec 2009
Location: Spain
Posts: 58
Rep Power: 7
David_010 is on a distinguished road
Hi anke

Yes I think that is the appropriate solver, because if the difference of temperature between rooms is important, the conduction equation must be solvet on the wall. If you need the radiation model, may be you can add it to the chtMultiRegionalFoam but Im not able to help you in this way. On the other hand, if you consider that the heat flux between rooms is negligible, you can fix the zeroGradient condition for the temperature on the walls.

Sorry for not being more help.

Regars

David
David_010 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
Heat transfer BC at wall- why need wall thickness? Julie FLUENT 7 February 3, 2012 22:41
Convective / Conductive Heat Transfer in Hypersonic flows enigma Main CFD Forum 2 November 1, 2009 23:53
Heat transfer @ wall boundary AlessandroD CFX 0 August 18, 2009 06:09
Water vapour condensation in CFX-5.7.1 hdj CFX 1 November 27, 2005 08:15
Prediction of wall heat transfer coeff. Sridhar Main CFD Forum 0 August 9, 2002 07:27


All times are GMT -4. The time now is 21:59.