CFD Online URL
[Sponsors]
Home > Forums > CFX

Heat transfer thorugh porous

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 14, 2012, 04:43
Default Heat transfer thorugh porous
  #1
Senior Member
 
Govindaraju
Join Date: Apr 2010
Posts: 194
Rep Power: 6
kmgraju is on a distinguished road
Hi
I have fluid domain and porous domain. I need to keep the temperature of the porous domain higher than the room temperature. and the fluid must be kept at room temperature. when the fluid flow through porous domain the heat will be transferred to the fluid domain.
please suggest how do I model this.

I simply put under porous domain >fluid model>Heat transfer>option > Iso thermal > temperature 350 K
But I cannot put 300 K in the fluid domain. when I put 300 K in the fluid domain the porous domain temperature automatically changes to 300K
Kindly how do I model this

Thank you

Regards

Govind
kmgraju is offline   Reply With Quote

Old   December 14, 2012, 05:40
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 9,860
Rep Power: 78
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
If you are modelling something which keep the fluid at room temperature and the porous domain at a higher temperature then model the effect of whatever gizmo is keepign these temperatures - if the porous domain has heating coils in it then put the coils in as a heat sink or isothermal boundary. Do not just artificially make up restrictions because that is what you think should happen.

Your model selections are for isothermal - but you want to model heat transfer. So obviously it is not isothermal, you will have to use a thermal model.
ghorrocks is offline   Reply With Quote

Old   December 14, 2012, 10:15
Default
  #3
Senior Member
 
Chris DeGroot
Join Date: Nov 2011
Location: Canada
Posts: 387
Rep Power: 6
cdegroot is on a distinguished road
The problem set up you describe doesn't make sense. If you are just going to specify the temperatures, what is the point of even modeling them? I think what you actually want is to make the porous solid temperature higher so that the fluid picks up heat as it flow through, right?

Like Glenn said, to do this you need to turn on the heat transfer model and rethink what you are trying to model. More likely, you want a 300K inlet fluid and some kind of BC in the porous region representing a heater or something like that. Could be a constant wall temperature in the porous domain for example.
cdegroot is offline   Reply With Quote

Old   December 15, 2012, 00:22
Default
  #4
Senior Member
 
Govindaraju
Join Date: Apr 2010
Posts: 194
Rep Power: 6
kmgraju is on a distinguished road
Dear friends
I realize my mistakes. I will correct it

Thank you very much for your advice

Thank you

Govind
kmgraju 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
Porous domain:Interfacial area density and heat transfer coefficient l.te CFX 2 May 18, 2014 00:45
Heat Transfer in Porous Medium eryan STAR-CD 0 September 28, 2010 14:14
Convective / Conductive Heat Transfer in Hypersonic flows enigma Main CFD Forum 2 November 1, 2009 23:53
Conjugate heat transfer problem with porous media piko CD-adapco 1 April 17, 2009 16:41
Convective Heat Transfer - Heat Exchanger Mark CFX 6 November 15, 2004 16:55


All times are GMT -4. The time now is 17:35.