CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Porous Medium Question

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 17, 2012, 01:48
Default Porous Medium Question
  #1
Member
 
Hamza Motiwala
Join Date: Nov 2010
Posts: 41
Rep Power: 15
hamzamotiwala is on a distinguished road
Hey Friends,

I defined a part of my geometry as a seperate porous region. The output velocity from the porous region is approximately 20m/s lesser than what its suppose to be.

I tried changing the porosity, the dissipation rate, the material properties, the resistances..i just cant seem to get the right combination or hit the right option.

The porous medium also acts as a heat sink. I use the material properties of aluminium.

Does anyone have any idea with what settings can I increase the output velocity from the porous medium?

Thanks,
Hamza
hamzamotiwala is offline   Reply With Quote

Old   April 20, 2012, 02:55
Default
  #2
Senior Member
 
Ping
Join Date: Mar 2009
Posts: 556
Rep Power: 20
ping is on a distinguished road
first turn off porous media and ensure you achieve a reasonalbe flow - if this does not happen then addiing resistance is not going to improve it!
then with porous on start with very low values for viscous and inertial coefs eg .001 - might be unstable, and slowly increase them until to get near you required flow rate.
ping is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Flow through porous medium Kiran AS FLUENT 6 September 16, 2011 07:38
Heat Transfer in Porous Medium eryan STAR-CD 0 September 28, 2010 13:14
Modelling sound propagation through layered porous media nkinar Main CFD Forum 0 July 4, 2010 14:45
Have one question, almost porous medium. lobzik FLUENT 2 June 21, 2009 21:33
porous medium as heat source Ralf Schmidt FLUENT 1 November 4, 2005 13:12


All times are GMT -4. The time now is 23:37.