CFD Online Logo CFD Online URL
Home > Forums > FLUENT

species mass source in porous media ?

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

LinkBack Thread Tools Display Modes
Old   February 16, 2007, 12:12
Default species mass source in porous media ?
Posts: n/a
Hi ,

I have 2D case : cylinder (porous media) which is in a much bigger Control volume(non porous) (flow is from inlet to outlet,...). This cylinder is acting like a sink of species.

When I am running a simulation WITHOUT removing specie in this 2D cylinder NON POROUS media and another as a POROUS media : In both cases I have the same species mass fraction,VOLUME Integrale,Vol Avg, Mass Int and Mass Avg in this 2D cylinder zones (porous or Non porous).

To remove a certain amount of specie (in the cylinder) ,I use a UDF(DEFINE_SOURCE) with Si = Mass of specie in cell(i)/ SUM(vol cell(i)).

A)If the cylinder is NonPorous : Non prob.

B)If the cylinder is Porous : There is a Prob : Even though , species have same mass fractions(Porous /non porous) , there is less Species avalaible (less flow rate ) in the cylinder(in the non porous case) : and so there is the not the same amount left in both Cases (less in the porous case).

Q: How this Si (source term) is linked to the local mass flow rate in a cell i ? ; How to solve this problem then ?.

Thanks for any help

  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
swak4foam building problem GGerber OpenFOAM Installation 54 April 24, 2015 16:02
OpenFOAM on MinGW crosscompiler hosted on Linux allenzhao OpenFOAM Installation 127 January 30, 2009 20:08
Add source term in species equation zhou1 FLUENT 1 October 21, 2003 06:28
mass transfer in porous media?? yee wan FLUENT 0 December 23, 2002 21:39
UDFs for Scalar Eqn - Fluid/Solid HT Greg Perkins FLUENT 0 October 11, 2000 03:43

All times are GMT -4. The time now is 10:53.