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

About Porous wall for thin surface.

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 8, 2003, 08:07
Default About Porous wall for thin surface.
  #1
windhair1
Guest
 
Posts: n/a
I want to define a thin surface inside a flow domain, where I want to set some user scalar boundary condition (potential), but the other mass fractions should walk through all the flow domain which is porous media. The runsolove did not converged when I write "porous wall" in >>wall boundary conditions. If I comment this, it is converged, but that is not my situation.

The CFX support person are in holiday, that is a pity, but it is urgent for me to work it out soon. Any one have some advice for this?

Thx.
  Reply With Quote

Old   October 11, 2003, 13:29
Default Re: About Porous wall for thin surface.
  #2
jeff
Guest
 
Posts: n/a
There are no "porous wall" conditions. Sorry. Assuming you're working on something fuel cell-esque, this is a very hard boundary condition to implement. Perhaps making the first layer of cells very thin and applying a "volumetric" source equivalent to what the "area" source would be for a wall? That's my best suggestion.

Jeff
  Reply With Quote

Old   October 14, 2003, 05:44
Default Re: About Porous wall for thin surface.
  #3
Bob
Guest
 
Posts: n/a
Not 100% sure I understand, but if you prescribe a source on the one side of the thin surface in the adjacent cells (which you define as being very thin), then you may also have to define a sink on the other side of the thin surface ? I'm not sure if you can define a variable source/sink that is dependent upon the volume fraction of scalar that is upstream of the thinsurface ?? if that is what is indeed needed ? Bob
  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
Natural convection in a closed domain STILL NEEDING help! Yr0gErG FLUENT 3 June 12, 2013 02:12
modelling a porous wall as outlet Swen FLUENT 3 July 10, 2011 07:42
surface reaction, porous media Ali FLUENT 0 February 18, 2007 18:46
wall surface reaction. help Emanuele De Bonis FLUENT 2 February 17, 2007 05:07
Porous fow with rotating wall Yi Wang Main CFD Forum 0 August 19, 1998 09:03


All times are GMT -4. The time now is 14:00.