porous media

bitak · April 2, 2015, 04:38

Hello.
I tried to simulate a simple tube which has a porous layer wall.
governing equations are Navier-Stocks in the inner tube.
the velocity profile in the interface should be continuous (as shown in the picture)
but the result shows false information!
I don't know why.
please help me.
best

ghorrocks · April 6, 2015, 19:06

I have no idea what the graphs you show mean. Some explanation would help. Also an image of what you are modelling and your CCL.

bitak · June 26, 2015, 15:55

Hello.
I can not set the true interface boundary condition in the CFX.
I want to simulate a pipe which has a porous layer wall.

in fact two domain are couple.
fluid domain inside a pipe and the porous aroud the pipe.

Steffen595 · June 29, 2015, 01:10

I suppose, the velocity peaks where it touches the wall, because the mass flow is constant, but the porosity settings say volume fraction. I.e. say 80% is solid, 20 fluid, so then to get the same volume through, it has to be 5 times faster?
Maybe try rough wall settings?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Multiphase Porous Media Flow - Convergence Issues	VT_Bromley	FLUENT	7	May 14, 2020 16:34
Porous media setup issues in Fluent	Bernard Van	FLUENT	29	January 26, 2017 04:09
How to model granular flow through porous media	Axius	FLUENT	2	August 7, 2014 10:34
species mass source in porous media ?	PK	FLUENT	0	February 16, 2007 11:12
porous media: Fluent or Star-CD?	Igor	Main CFD Forum	0	December 5, 2002 15:16

April 6, 2015, 19:06		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	I have no idea what the graphs you show mean. Some explanation would help. Also an image of what you are modelling and your CCL.

June 26, 2015, 15:55		#3
bitak Member bitak Join Date: Jul 2009 Posts: 56 Rep Power: 16	Hello. I can not set the true interface boundary condition in the CFX. I want to simulate a pipe which has a porous layer wall. in fact two domain are couple. fluid domain inside a pipe and the porous aroud the pipe.

June 29, 2015, 01:10		#4
Steffen595 Senior Member Join Date: May 2012 Location: Melbourne Posts: 161 Rep Power: 13	I suppose, the velocity peaks where it touches the wall, because the mass flow is constant, but the porosity settings say volume fraction. I.e. say 80% is solid, 20 fluid, so then to get the same volume through, it has to be 5 times faster? Maybe try rough wall settings?