porous media boundary condition

hooman.esl · April 29, 2017, 07:46

Hi everybody,
I have a simple question
I am working on flow in porous media. for beginning, I simulate the one phase(incompressible) flow in porous media core with 30 cm long and 5 cm diameter. the boundary condition for the problem was:
inlet-velocity of 0.1 m3/s for inlet
outflow for outlet
the problem was that after solving, the pressure at the end of the core is negative.
does anyone know why?

LuckyTran · April 29, 2017, 22:47

Pressures in Fluent are gauge pressures.

Did you check specifically the absolute pressure variable or are you looking at static (gauge) pressure?

hooman.esl · April 30, 2017, 07:19

Quote:

Originally Posted by LuckyTran

Pressures in Fluent are gauge pressures.

Did you check specifically the absolute pressure variable or are you looking at static (gauge) pressure?

both static and absolute pressure are getting negative from the middle of the core.contour.png

April 29, 2017, 07:46	porous media boundary condition	#1
hooman.esl New Member Hooman Join Date: Jan 2016 Posts: 19 Rep Power: 10	Hi everybody, I have a simple question I am working on flow in porous media. for beginning, I simulate the one phase(incompressible) flow in porous media core with 30 cm long and 5 cm diameter. the boundary condition for the problem was: inlet-velocity of 0.1 m3/s for inlet outflow for outlet the problem was that after solving, the pressure at the end of the core is negative. does anyone know why?

April 29, 2017, 22:47		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,751 Rep Power: 66	Pressures in Fluent are gauge pressures. Did you check specifically the absolute pressure variable or are you looking at static (gauge) pressure? hooman.esl likes this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Error - Solar absorber - Solar Thermal Radiation	MichaelK	CFX	12	September 1, 2016 06:15
An error has occurred in cfx5solve:	volo87	CFX	5	June 14, 2013 18:44
Velocity inlet boundary condition for porous medium	Chander	CFX	3	March 11, 2012 22:18
vorticity boundary condition	bearcharge	Main CFD Forum	0	May 14, 2010 12:32
Convective Heat Transfer - Heat Exchanger	Mark	CFX	6	November 15, 2004 16:55