# Inputs for Porous Cell Zone

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

February 22, 2012, 06:46
Inputs for Porous Cell Zone
#1
New Member

Chirag
Join Date: Feb 2012
Posts: 18
Rep Power: 7
Hello,

I am trying to analyze small heat exchanger as porous zone.

I am not getting how to give following properties which are available to me as

Viscous resistant: 1.58e-8

Nonlinear inertial resistant: 9.08e3

How to specify them in FLUENT panel ??????

Direction vector-2:

Viscous resistant in Direction-1:
Direction-2:

inertial resistant in Direction -1:
Direction-2:

etc..............

Should i keep activate the 1) relative velocity formulation
2) Alternative formulation..........etc.

Attached Images
 Untitled.jpg (97.2 KB, 20 views)

 February 24, 2012, 07:26 #2 Senior Member   Join Date: Mar 2009 Location: Indiana, US Posts: 185 Rep Power: 10 Direction-1 is the direction of the flow through the porous media, and direction-2 is the normal. Enter the given viscous and inertial coefficients for Direction-1 and enter a higher value of the coefficients (my practice is 100 times) for direction-2. This means that you are increasing the resistance to the flow in the normal direction and giving the right amount of resistance in the flow direction. I hope i made myself clear Regards Luke Note: Do not use the velocity formulations unles you're what it means and if you need it.

 February 24, 2012, 13:00 #3 New Member   Chirag Join Date: Feb 2012 Posts: 18 Rep Power: 7 Thanks for the guidance...... Regards, Chirag.

 March 3, 2012, 00:16 fixed value option in porous media #4 New Member   Chirag Join Date: Feb 2012 Posts: 18 Rep Power: 7 Hello, I am trying to model a oscillatory flow(fluid will move back and forth from heat exchanger at the rate of oscillation 300Hz) through the heat exchanger of very small size. For that I am considering or modeled heat exchanger as a porous media and I want to maintain the temperature of heat exchanger at 600 K and gas temperature is less than the heat exchanger temperature. So, heat will flow from heat exchanger porous material to the gas. For this situation, I am modelling compressible flow (I think, I should use Density based solver...?) through porous media. But during the input of porous media in fluent "Fixed Value" option is not working when density based solver is activated. It is only working with Pressure based solver. Any one can guide me on this.........? How can I set the constant temperature of porous media while using density based solver?

 Tags inputs porous cell zone

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Tarak OpenFOAM 6 September 9, 2011 17:51 Purushothama Siemens 2 May 31, 2010 21:58 csvirume FLUENT 2 September 9, 2009 01:08 michele OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 2 July 15, 2005 04:15 AB Siemens 6 November 15, 2004 05:41

All times are GMT -4. The time now is 17:52.