Porous domain set-up from single pressure loss value

siw · December 8, 2011, 10:53

Hi,

For porous domain modelling I usually have a table and graph of volumetric flow rate (Q) vs. pressure loss (dp). From the quadratic equation of the graphed data I can get the 2 coefficients for CFX.

However, for a current task I only have a single value of dp at a single Q which was experimentally recorded. How can I set up a CFX porous domain with this limited amount of data? I have the actual geometry of the porous domain which has a rectangular cross-section and a thickness. Experimental work will definitely not be done to get more data and to be able to make a graph of Q vs. dp.

The aim of the simulation is to visualise the flowfield inside the device which also includes the porous domain.

Thanks

ghorrocks · December 8, 2011, 17:36

Have a look at the porous flow equations, and maybe some academic papers on porous flow. You will probably be able to evaluate all the coefficients even though you only have one point as the porous flow curve should be known.

December 8, 2011, 10:53	Porous domain set-up from single pressure loss value	#1
siw Senior Member Stuart Join Date: Jul 2009 Location: Portsmouth, England Posts: 742 Rep Power: 26	Hi, For porous domain modelling I usually have a table and graph of volumetric flow rate (Q) vs. pressure loss (dp). From the quadratic equation of the graphed data I can get the 2 coefficients for CFX. However, for a current task I only have a single value of dp at a single Q which was experimentally recorded. How can I set up a CFX porous domain with this limited amount of data? I have the actual geometry of the porous domain which has a rectangular cross-section and a thickness. Experimental work will definitely not be done to get more data and to be able to make a graph of Q vs. dp. The aim of the simulation is to visualise the flowfield inside the device which also includes the porous domain. Thanks

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Interface between fluid domain and porous domain	windhair	CFX	6	May 10, 2018 15:26
How to choose or find Permeability for a Porous screen model using darcy's law....	arunraj	CFX	4	September 27, 2011 01:20
Pressure Loss dependet on Flow Direction	MichaelN	CFX	2	June 5, 2011 12:22
Momentum source / porous loss	ijk	CFX	5	May 20, 2011 11:30
Porous region set	braket	FLUENT	4	November 18, 2010 03:09

December 8, 2011, 17:36		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	Have a look at the porous flow equations, and maybe some academic papers on porous flow. You will probably be able to evaluate all the coefficients even though you only have one point as the porous flow curve should be known.