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

Porous media : simulation of an heat exchanger

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 28, 2009, 11:01
Default Porous media : simulation of an heat exchanger
  #1
New Member
 
Arnaud
Join Date: Jul 2009
Posts: 6
Rep Power: 8
Arnaud is on a distinguished road
Hello,

I am simulating the cooling down of the air through an heat exchanger.
It has aluminium fins.

I need that you validate (or not) my thought.

I want to put the right pressure drops in the flow direction (Z) and to forbid the flow in the other direction (becaus of the fins).

* viscous resistance = f(1/permeability)
-> Z : 0 (no material in this direction)
-> X,Y : high value to forbid the flow in this direction

* inertial resitance = f(pressure loss per unit lenght along the flow direction)

-> Z : the coefficient I've calculated to obtain the good pressure drop
-> X,Y : 0 (no friction pressure drop in this direction)

What do you think about that?

Thank you for each answer.
Arnaud is offline   Reply With Quote

Old   July 29, 2009, 04:39
Default
  #2
New Member
 
Arnaud
Join Date: Jul 2009
Posts: 6
Rep Power: 8
Arnaud is on a distinguished road
someone has any idea?
Arnaud is offline   Reply With Quote

Old   July 29, 2009, 09:28
Default
  #3
New Member
 
wu
Join Date: Jul 2009
Posts: 14
Rep Power: 8
whiz is on a distinguished road
About the pressure drop, you are right.
The problem is how to treat the heat transfer between the air and the fins.
whiz is offline   Reply With Quote

Old   July 29, 2009, 09:56
Default
  #4
New Member
 
Arnaud
Join Date: Jul 2009
Posts: 6
Rep Power: 8
Arnaud is on a distinguished road
in fact, I just calculate the temperature exchanges to have the good density, in the aim of having the good pressure drops in my model. I don't seek to have the real temperature.

I have one inlet an one outlet. I know that I have 155°C in the inlet and I want 50°C in the outlet. So I've calculated the heat exchange (Q=mCdT) in created a energy source in the porous media.
Arnaud is offline   Reply With Quote

Old   July 29, 2009, 10:02
Default
  #5
New Member
 
wu
Join Date: Jul 2009
Posts: 14
Rep Power: 8
whiz is on a distinguished road
the pressure drop is dependent on the fluid properties which are dependent on the temperature.

whiz is offline   Reply With Quote

Old   July 29, 2009, 10:06
Default
  #6
New Member
 
Arnaud
Join Date: Jul 2009
Posts: 6
Rep Power: 8
Arnaud is on a distinguished road
i know. That's why I have implemented a source term. The Temperature depend on the velocity.
I meant that the modelization of the temperature exchanges is sufficient with a source term for me (I don't need to develop an udf to be more precise).
Arnaud is offline   Reply With Quote

Old   October 19, 2009, 04:45
Default
  #7
Member
 
toto
Join Date: Jun 2009
Posts: 71
Rep Power: 8
ronaldo is on a distinguished road
Hi Arnaud,

please witch Solver are you used? Could you send me your case?

I would like to simulate an Heat exchanger too, but it don´t work!

Thank you in advance
ronaldo is offline   Reply With Quote

Reply

Tags
fluent, heat exchanger, porous media

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
about porous media major FLUENT 5 March 6, 2013 11:00
Flow simulation in porous media olesen OpenFOAM Running, Solving & CFD 18 November 20, 2012 03:10
Two phase flow in porous media Madhavi Krishnan FLUENT 3 June 6, 2005 05:52
porous media sankar CD-adapco 1 December 14, 2004 07:15
heat transfer in porous media Jörg Brozio FLUENT 1 March 28, 2000 23:17


All times are GMT -4. The time now is 17:07.