How to get nodal values with a routine in preprocessor

l.te · October 17, 2012, 05:09

Hello boys,
I'm doing a simulation when I must insert a thermal contact resistance between a cylindrical part and a die. The problem is that this thermal contact resistance depends on a "Distance function" that is f(Temperature, Additional variable "Alfa") with Alfa defined on the part domain.
I want the values of "Distance function" at every z over the length of the part.
To do that, I must do a routine (for cicle: How I can implement this in preprocessor?) in which I get the values of T and Alfa at every node along the "z" axis, but to do this, how I can access at the nodes of the mesh that I defined in mesher? And how I can say at the CFX Preprocessor: "you must get the T and Alfa values of every node at every z along the axis of the piece"?
Thanks

ghorrocks · October 17, 2012, 06:56

Let's take a step back from details of the implementation. First, can you describe the function you want to implement? What is the distance function, and how is the temperature and alfa processed as inputs (ie, local value at the interface, averaged over a certain region, taken from another location, etc).

October 17, 2012, 05:09	How to get nodal values with a routine in preprocessor	#1
l.te New Member Join Date: Sep 2012 Location: Europe Posts: 25 Rep Power: 14	Hello boys, I'm doing a simulation when I must insert a thermal contact resistance between a cylindrical part and a die. The problem is that this thermal contact resistance depends on a "Distance function" that is f(Temperature, Additional variable "Alfa") with Alfa defined on the part domain. I want the values of "Distance function" at every z over the length of the part. To do that, I must do a routine (for cicle: How I can implement this in preprocessor?) in which I get the values of T and Alfa at every node along the "z" axis, but to do this, how I can access at the nodes of the mesh that I defined in mesher? And how I can say at the CFX Preprocessor: "you must get the T and Alfa values of every node at every z along the axis of the piece"? Thanks

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
user subroutine error	CFDUSER	CFX	2	December 9, 2006 07:31
user defined function	cfduser	CFX	0	April 29, 2006 11:58
Extracting nodal values from a plane!!	Thundil	FLUENT	0	June 10, 2005 03:34
high difference between cell and nodal values	Trilok	FLUENT	2	November 13, 2003 04:38
nodal temperature values	Mcgregor	FLUENT	0	May 5, 2003 09:19

October 17, 2012, 06:56		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	Let's take a step back from details of the implementation. First, can you describe the function you want to implement? What is the distance function, and how is the temperature and alfa processed as inputs (ie, local value at the interface, averaged over a certain region, taken from another location, etc).