CFD Online Logo CFD Online URL
Home > Forums > FLUENT

How define porous media as INLET?

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

LinkBack Thread Tools Display Modes
Old   April 3, 2001, 22:14
Default How define porous media as INLET?
Harry Qiu
Posts: n/a
Dear Mr. or Mrs.:

I'm modeling a flameless furnace.

The inlet of the furnace is porous media(ceramic).Actually that porous media is one plate in which there are many many little parallel pores(Diameter of each pore=1.2mm).

Methane burned within these little pores, then flue gas enters furnace through these pores.

If I define MANY-PORES INLET for furnace in terms of real situation, that is, only define many little pores as INLET, then I may have trouble in meshing the pores and furnace. Too little pore size, compared to large furnace, will result in too dense grids. A large quantity of grids need many computer memory. So, in order to escape that too-dense-grid difficulty, I want to directly define inlet as POROUS MEDIA to consider both "flue gas flow" and "plate radiation to furnace" at the same time.

Can you give me some advice about how to define "POROUS MEDIA INLET"? Any suggestion is welcomed.

Thank you.

Sincerely yours, Harry.
  Reply With Quote

Old   April 4, 2001, 05:55
Default Re: How define porous media as INLET?
Posts: n/a
hi i think you should just find out the resistance value of your porous, and use fluent UDF functions for solving porous media problems.

bye arvindr
  Reply With Quote

Old   April 13, 2001, 16:34
Default Re: How define porous media as INLET?
Xiao Hu
Posts: n/a
Looks like that all you need is to add some pressure drop at your inlet. So, you don't want to model all the details. Try to use inlet vent boundary condition to model pressure drop in your case.
  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
Discrete phase modeling on porous media magnounibo FLUENT 0 April 9, 2009 08:18
REAL GAS UDF brian FLUENT 6 September 11, 2006 08:23
porous media sankar Siemens 1 December 14, 2004 07:15
Porous media and convergence A.Joshi FLUENT 0 October 21, 2003 22:09
Moderately porous media Jing Siemens 8 April 8, 2002 09:28

All times are GMT -4. The time now is 06:38.