User Defined function for scalar gradient caculation with Star ccm+ V4

coolio · July 25, 2010, 13:04

Hi all!

I m modeling flow and heat transfer in a heat exchanger model. After convergence of a simulation (or even during the simulation), i would like to caculate the temperature gradient at any point of the computational domain. I have tried to have a look at the User guide for the implementation of user Fortran code into Star CCM+ but the examples found concern only very simple user profile codes.

Could anyone help me please?

Coolio

coolio · July 27, 2010, 13:21

Sorry!

I found a solution! I was using an old version of the software! After updating to the new release (5.04), i found many derivative operators!

Regards!

onlyacan · December 21, 2011, 11:36

can you tell me how did you adapt the derivative operator in the STAR-CCM+?
thank you very much, my email is 54acan@gmail.com

willimanili · December 21, 2011, 18:13

The field function "grad($Temperature)" provides you the gradient vector of temperature for your given coordinate system.
If you are just interested in the magnitude value of the gradient vector just use "mag(grad($temperature))".

Krishna Thombare · August 11, 2023, 06:38

I want to take dot product of gradient operator and unit normal vectopr for this i need to take just gradient operator so is it like "grad" only or $$grad please help?

thanks
krishna.

July 25, 2010, 13:04	User Defined function for scalar gradient caculation with Star ccm+ V4	#1
coolio New Member NVilius Join Date: Jul 2010 Posts: 3 Rep Power: 16	Hi all! I m modeling flow and heat transfer in a heat exchanger model. After convergence of a simulation (or even during the simulation), i would like to caculate the temperature gradient at any point of the computational domain. I have tried to have a look at the User guide for the implementation of user Fortran code into Star CCM+ but the examples found concern only very simple user profile codes. Could anyone help me please? Coolio Last edited by coolio; July 26, 2010 at 04:16.

December 21, 2011, 11:36	how do you realize it?	#3
onlyacan New Member Can Huang Join Date: Oct 2010 Posts: 8 Rep Power: 16	can you tell me how did you adapt the derivative operator in the STAR-CCM+? thank you very much, my email is 54acan@gmail.com

December 21, 2011, 18:13		#4
willimanili Member Join Date: Feb 2011 Location: DE-PB Posts: 56 Rep Power: 15	The field function "grad($Temperature)" provides you the gradient vector of temperature for your given coordinate system. If you are just interested in the magnitude value of the gradient vector just use "mag(grad($temperature))". lisa_china likes this. Last edited by willimanili; December 22, 2011 at 03:09. Reason: changed abs to mag

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[Other] StarToFoam error	Kart	OpenFOAM Meshing & Mesh Conversion	1	February 4, 2010 05:38
solving passive scalar by user function in AVLFIRE	huyp	Main CFD Forum	0	September 4, 2008 11:21
Gradient of a User defined Variable	Ramadas	CFX	2	August 21, 2007 10:19
User defined function for density gradient	ben akih	CFX	3	October 10, 2006 22:47
user defined function	cfduser	CFX	0	April 29, 2006 11:58

July 27, 2010, 13:21		#2
coolio New Member NVilius Join Date: Jul 2010 Posts: 3 Rep Power: 16	Sorry! I found a solution! I was using an old version of the software! After updating to the new release (5.04), i found many derivative operators! Regards!

August 11, 2023, 06:38		#5
Krishna Thombare New Member Krishna Thombare Join Date: Jul 2023 Posts: 4 Rep Power: 3	I want to take dot product of gradient operator and unit normal vectopr for this i need to take just gradient operator so is it like "grad" only or $$grad please help? thanks krishna.