Gradient of a variable calculation in CFX PRE

Luigi · September 11, 2017, 04:42

I need to calculate the gradient of an additional variable and insert it in another equation as source term.
Is there a simple way to calculate the gradient in the CFX PRE, e.g. using CEL expressions?

Opaque · September 14, 2017, 15:10

For example you have a created an additional variable named MyAV, you can then access its spatial gradient components as MyAV.Gradient X, MyAV.Gradient Y, MyAV.Gradient Z as needed in your CEL expressions

Hope the above helps,

Luigi · September 15, 2017, 04:04

Thank you. I found that the CEL expression MyAv.Gradient_x works!

September 11, 2017, 04:42	Gradient of a variable calculation in CFX PRE	#1
Luigi New Member Luigi Gurreri Join Date: Jul 2012 Posts: 18 Rep Power: 13	I need to calculate the gradient of an additional variable and insert it in another equation as source term. Is there a simple way to calculate the gradient in the CFX PRE, e.g. using CEL expressions?

September 14, 2017, 15:10		#2
Opaque Senior Member Join Date: Jun 2009 Posts: 1,804 Rep Power: 32	For example you have a created an additional variable named MyAV, you can then access its spatial gradient components as MyAV.Gradient X, MyAV.Gradient Y, MyAV.Gradient Z as needed in your CEL expressions Hope the above helps, Ashkan Kashani likes this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
overwrite a variable in CFX pre	alirezame	CFX	4	July 20, 2023 04:22
CEL expression in CFX pre	Jane92	Main CFD Forum	1	June 3, 2016 02:48
emag beta feature: charge density	charlotte	CFX	4	March 22, 2011 09:14
Assign new variable in CFX Post	Ben	CFX	1	August 25, 2008 14:59
User Defined Variable in CFX PRE	Hamidur Rahman	CFX	2	September 21, 2007 14:18

September 15, 2017, 04:04		#3
Luigi New Member Luigi Gurreri Join Date: Jul 2012 Posts: 18 Rep Power: 13	Thank you. I found that the CEL expression MyAv.Gradient_x works!