CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Porous formulation

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

LinkBack Thread Tools Search this Thread Display Modes
Old   July 7, 2009, 21:37
Default Porous formulation
New Member
Join Date: Apr 2009
Posts: 7
Rep Power: 16
visuja is on a distinguished road

I have a few queries on how Fluent treats the porous zone. I have two fluid zones in my simulation domain, one of which has a porosity of 0.6. I am simulating a mass transfer problem, with convection + diffusion in the fluid zone, and pure diffusion in the porous zone. The interface between the two zones is set as "interior".

How does Fluent treat the diffusion coefficient in the porous zone? for example, if my diffusivity is 1e-11 in the fluid zone, is the diffusivity in the porous zone = 0.6 * 1e-11, or do I need to input this separately for the porous zone using a UDF?

In theory, since diffusivity in a porous zone is defined as
Bulk Diffusivity * porosity / Tortuosity,
my input for the porous zone needs to be adjusted for the porous zone tortuosity as well.

Please advise.

visuja is offline   Reply With Quote


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
Porous Formulation hbf FLUENT 1 July 1, 2009 07:20
Porous Formulation in Aerodynamic computation F.B. FLUENT 1 May 13, 2008 17:40
physical velocity formulation and porous media KLG FLUENT 2 June 10, 2003 10:14
porous media: Fluent or Star-CD? Igor Main CFD Forum 0 December 5, 2002 15:16
porous body formulation K. Natesan Siemens 0 November 22, 2002 03:29

All times are GMT -4. The time now is 08:19.