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

unidirectional flow in porous media

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 1, 2004, 16:04
Default unidirectional flow in porous media
  #1
Brian
Guest
 
Posts: n/a
I'm trying to simulate gas flow through a bundle of hollow tubes. Is it possible to model this bundle as a porous media while constraining the flow to only one direction (along the axis of the hollow tubes)? Does anyone have any experience with problems such as this?

thanks in advance for any help
  Reply With Quote

Old   September 1, 2004, 16:40
Default Re: unidirectional flow in porous media
  #2
Evan Rosenbaum
Guest
 
Posts: n/a
Just set a very large resistance in the other coordinate directions.
  Reply With Quote

Old   September 1, 2004, 16:53
Default Re: unidirectional flow in porous media
  #3
Brian
Guest
 
Posts: n/a
evan, thanks for the post

i have been trying this, but i still get a great deal of flow in the two 'wrong' directions... i think i may have the resistance coefficients mixed up...

should the viscous resistance coefficient be small in the 'correct' flow direction and large in the 'wrong' flow directions?

thanks again
  Reply With Quote

Old   September 2, 2004, 08:38
Default Re: unidirectional flow in porous media
  #4
guru
Guest
 
Posts: n/a
Hello:

If you are planning to model porous media for "Tube Banks" you should be playing with Inertia Resistance. As C2 is very large & (1/alpha) can be taken as Zero for Flow through the Tube banks.

Referene : 6.19.2 of Fluent Help.

Correct me If you are wrong.

Regards, -guru.
  Reply With Quote

Old   September 2, 2004, 09:02
Default Re: unidirectional flow in porous media
  #5
guru
Guest
 
Posts: n/a
btw One more thing ...the the difference in the resistance coefficients shouldn't be more than 3 order. say If you have 200 1/m in the flow direction then other two directions shouldn't have more than 200e3 1/m for the better convergence..

regards-guru.

  Reply With Quote

Old   September 2, 2004, 10:42
Default Re: unidirectional flow in porous media
  #6
Brian
Guest
 
Posts: n/a
Guru, Thank you for the advice! I never thought to search the help files for "tube bank"... hopefully this will help.

Thanks again, Brian
  Reply With Quote

Old   September 2, 2004, 10:53
Default Re: unidirectional flow in porous media
  #7
Brian
Guest
 
Posts: n/a
Guru, Thanks for the tip! I ran a few iterations and then checked my contours/vectors and everything seems to be acting much more like it should. I really appreciate the help!

-Brian
  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
How to model granular flow through porous media Axius FLUENT 2 August 7, 2014 10:34
Compressible flow through porous media? JoFFe CFX 2 November 1, 2010 05:50
Testing the integrity of POROUS media and por jump Azman FLUENT 0 July 31, 2006 11:11
Modeling porous media flow in prostar Nirmal Kumar Pathak CD-adapco 8 November 23, 2005 08:18
Flow resistance of porous media Desheng Kong Main CFD Forum 3 December 19, 2000 12:07


All times are GMT -4. The time now is 03:28.