How to use non-equilibrium thermal model for porous medium in Ansys CFX 13.0?

Chander · November 25, 2011, 13:07

Hi,

Ansys CFX 13.0 manual states that version 13.0 of CFX has non-equilibrium thermal model for porous medium as opposed to equilibrium thermal model for porous medium in CFX 12.1.
However, the GUI interface for porous medium domain in CFX/13.0 appears to same as in 12.0. I think I am missing something.

So:
a) does the version 13.0 use non-equilibrium model for porous medium by default?
b) If so, then the model will require porous fluid- porous solid heat transfer coefficient. If I understand correctly, this has to be a user input. Where does one specify that?
c) Can one select between equilibrium/ non-equilibrium model for porous medium in CFX/13.1?

I somehow could not find info on this in CFX-Pre manual for Ansys 13.0.

Chander · November 26, 2011, 15:52

Anyone please..

ghorrocks · November 27, 2011, 05:16

The non-equilibrium model might not be in CFX-Pre yet. To have a look at the full available options have a look in the CFX RULES file (I think it is in the /etc/directory). That lists the full available CCL.

Otherwise give CFX support a call.

Chander · November 28, 2011, 15:26

Hi Glen,

I contacted the Ansys support and found the solution in the tutorial on catalytic converter for Ansys 13.0. In Ansys 13.0, there is an additional solid definition field in porous domain settings. When the user specifies a solid definition, then the fields for fluid-solid area density and heat transfer coefficient become visible and the non-equilibrium thermal model is used

November 25, 2011, 13:07	How to use non-equilibrium thermal model for porous medium in Ansys CFX 13.0?	#1
Chander Senior Member Join Date: Oct 2010 Location: Zurich Posts: 176 Rep Power: 16	Hi, Ansys CFX 13.0 manual states that version 13.0 of CFX has non-equilibrium thermal model for porous medium as opposed to equilibrium thermal model for porous medium in CFX 12.1. However, the GUI interface for porous medium domain in CFX/13.0 appears to same as in 12.0. I think I am missing something. So: a) does the version 13.0 use non-equilibrium model for porous medium by default? b) If so, then the model will require porous fluid- porous solid heat transfer coefficient. If I understand correctly, this has to be a user input. Where does one specify that? c) Can one select between equilibrium/ non-equilibrium model for porous medium in CFX/13.1? I somehow could not find info on this in CFX-Pre manual for Ansys 13.0.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
mass flow in is not equal to mass flow out	saii	CFX	12	March 19, 2018 06:21
Superlinear speedup in OpenFOAM 13	msrinath80	OpenFOAM Running, Solving & CFD	18	March 3, 2015 06:36
[ICEM] Proper way to name boundaries on 2D model for use in CFX?	RossFS	ANSYS Meshing & Geometry	4	November 10, 2011 03:38
Reynolds Stress Model in Fluent Vs CFX	Tim	FLUENT	0	December 6, 2005 23:03
CFX bought by Ansys - good or bad?!	Pete	CFX	38	February 21, 2003 08:34

November 26, 2011, 15:52		#2
Chander Senior Member Join Date: Oct 2010 Location: Zurich Posts: 176 Rep Power: 16	Anyone please..

November 27, 2011, 05:16		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	The non-equilibrium model might not be in CFX-Pre yet. To have a look at the full available options have a look in the CFX RULES file (I think it is in the /etc/directory). That lists the full available CCL. Otherwise give CFX support a call.

November 28, 2011, 15:26		#4
Chander Senior Member Join Date: Oct 2010 Location: Zurich Posts: 176 Rep Power: 16	Hi Glen, I contacted the Ansys support and found the solution in the tutorial on catalytic converter for Ansys 13.0. In Ansys 13.0, there is an additional solid definition field in porous domain settings. When the user specifies a solid definition, then the fields for fluid-solid area density and heat transfer coefficient become visible and the non-equilibrium thermal model is used