CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Porous region set

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

LinkBack Thread Tools Display Modes
Old   November 13, 2005, 12:34
Default Porous region set
Posts: n/a
Hi, all

I am trying to model a 3D system consisted of channel and porous regions. I set two regions in Gambit. But how do I set the condition of boundaries?

Which boundary type do I set the contacting faces between two regions as, the interface or porous jump? If it is porous jump, which domain should the porous jump parameter be used in, surface or volume?

When I draw the system, I get two regions (channel and porous region) firstly, and then put them together. So there are two face between two regions. If I set the parameter as interface, how many faces need I set as interface, one surface or two surface?

Thank you very much!!!
  Reply With Quote

Old   November 14, 2005, 03:58
Default Re: Porous region set
Ralf Schmidt
Posts: n/a
Take care that the interface between two volumes is shared by both of them. That mean: when two volume touch each other, the touching interface must be part of BOTH volumes. If not, Fluent has two faces at the same position and get confused. you end up with walls that do not belong there.

Porous jump is just another concept of porousity. You can use it, when u have a very thin porous medium (like a membrane) than can be expressed in CFD as a face. So for your problem, use porous zone.

The boundary between porous zone and fluid is internal.

  Reply With Quote

Old   November 14, 2005, 10:55
Default Re: Porous region set
Posts: n/a
Firstly I used "VOLUME" to draw every part of the model, and then put them together. So there are two faces between two parts. How to delete one face, and let there be only an interface between two parts?

Thank you!
  Reply With Quote

Old   November 14, 2005, 11:11
Default Re: Porous region set
Ralf Schmidt
Posts: n/a
use the function "substract volume" or "split volume" with box "connetcted" on.

Sometimes it is very difficult to do so... So I am deleting the whole geometry (without the lower) and reconnect all lines to volumes again... Thats a hell lot of work ... but sometimes its the only way...
  Reply With Quote

Old   November 18, 2010, 03:09
New Member
Oky Andytya
Join Date: Nov 2010
Posts: 26
Rep Power: 6
oky is on a distinguished road

I have same problem, i draw volume as porous media in gambit but the result not suitable with any riset. If i draw face in gambit with bondary condition is porous-jump, fluent cannot read it.

Haw should i do ?

oky is offline   Reply With Quote


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
Porous media setup issues in Fluent Bernard Van FLUENT 26 July 24, 2015 18:24
Using starToFoam clo OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 33 September 26, 2012 04:04
How to set up a porous region? famerfamer STAR-CCM+ 4 September 29, 2011 01:50
turbulence model for porous region Nina CFX 1 June 11, 2008 13:05
Env variable not set gruber2 OpenFOAM Installation 5 December 30, 2005 05:27

All times are GMT -4. The time now is 18:36.