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

Conjugate heat transfer problem with porous media

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 16, 2009, 22:30
Default Conjugate heat transfer problem with porous media
  #1
New Member
 
Byoungil Ko
Join Date: Apr 2009
Posts: 1
Rep Power: 0
piko is on a distinguished road
Hello,, all

I try to solve conjugate heat transfer analysis with porous media using STAR-CD v4.06. I have many questions in this problem
Please tell me how to solve these questions.

Question1.
There are 7 cell types (1,2cell type : just fluid 3,4cell type : porous media fluid 5,6,7cell type : solid)
I should couple these cell types to solve conjugate heat transfer.
1. cset all
2. grids>assemble grids>creat couples>editor>option(fixed)>master #and slave cell type #>apply
3. each couple is proceeded as mentioned 2
4. finally, tool>couple tool>transform couple
then, there are a lot of cracks in the geometry

How can I remove these cracks?

Question2.
This geometry has porous media cells. I should conjugate heat transfer problem between porous cells and fluis, solid cells.
In the prostar-gui panel, porosity>thermal properties, How can I get effective conductivity(W/mk) and thermal conductance(W/m3k)?
piko is offline   Reply With Quote

Old   April 17, 2009, 15:41
Default
  #2
Senior Member
 
Aroon
Join Date: Apr 2009
Location: Racine WI
Posts: 148
Rep Power: 7
vishyaroon is on a distinguished road
I'll try to answer your second question.

The effective conductivity is supposed to be the conductivity in the porous media, which accounts for the conductivity of the solid part and the fluid part. This can be determines by

keff = a*k_solid + (1-a) * k_fluid

where a is the porosity

The thermal conductance is related to the heat transfer between the solid and fluid in the porous media.
vishyaroon 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
Conjugate heat transfer with periodic boundaries Suresh FLUENT 0 February 23, 2009 10:51
heat transfer in porous media Miko CD-adapco 5 May 24, 2007 05:12
Heat and Mass Transfer in Porous media Arvind Phate FLUENT 1 July 14, 2005 09:18
conjugate heat transfer problem Andreas CFX 1 February 5, 2002 19:22
heat transfer in porous media Jörg Brozio FLUENT 1 March 28, 2000 23:17


All times are GMT -4. The time now is 13:53.