# Question about setting thermal conductivity in CFX

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 May 20, 2013, 20:03 Question about setting up thermal conductivity in CFX #1 Senior Member     Meimei Wang Join Date: Jul 2012 Posts: 494 Rep Power: 8 Hi, May I ask how to set up the water conductivity to be Cartesian Components instead of only one value for all the directions? I didn't find this option in 'material property'. __________________ Best regards, Meimei Last edited by Anna Tian; May 21, 2013 at 04:16.

May 21, 2013, 04:53
#2
Member

Ben B. Huang
Join Date: Oct 2012
Posts: 49
Rep Power: 6
Quote:
 Originally Posted by Anna Tian Hi, May I ask how to set up the water conductivity to be Cartesian Components instead of only one value for all the directions? I didn't find this option in 'material property'.
use Expressions including coordinate direction.

May 21, 2013, 05:15
#3
Senior Member

Meimei Wang
Join Date: Jul 2012
Posts: 494
Rep Power: 8
Quote:
 Originally Posted by hwangpo use Expressions including coordinate direction.
I used:

'
THERMAL CONDUCTIVITY: Option = Orthotropic Cartesian Components
Thermal Conductivity X Component= 0.6069 [W m^-1 K^-1]
Thermal Conductivity Y Component= 0.6069 [W m^-1 K^-1]
Thermal Conductivity Z Component= 99999 [W m^-1 K^-1]
'

The error message is

'
The parameter "Option" in "/LIBRARY/MATERIALorous water/PROPERTIES/THERMAL CONDUCTIVITY" has the value "Orthotropic Cartesian Components". This does not match any of the allowed values: "Value, Kinetic Theory Model, Sutherlands Formula".
'

How to solve this problem?
__________________
Best regards,
Meimei

 May 21, 2013, 06:35 #4 Member   Ben B. Huang Join Date: Oct 2012 Posts: 49 Rep Power: 6 maybe that is not reasonable. check it again

May 21, 2013, 06:41
#5
Senior Member

Meimei Wang
Join Date: Jul 2012
Posts: 494
Rep Power: 8
Quote:
 Originally Posted by hwangpo maybe that is not reasonable. check it again

The error message shows that there are only three options "Value, Kinetic Theory Model, Sutherlands Formula". There is no option for Cartesian Components.

So it comes back to my initial question. Could you tell me how to set up the water conductivity to be Cartesian Components instead of only one value for all the directions? Could you give an example in which you have achieved the Cartesian Components setting for thermal conductivity?
__________________
Best regards,
Meimei

 May 21, 2013, 10:20 #6 Senior Member   Join Date: Jul 2010 Posts: 152 Rep Power: 8 You did it right. The problem is that it is not supported by GUI. That is why you have error message. So you can suppress this message and run it without any troubles. You work in WB or in standalone? Anyway both options will results in same way. So just supress it and thatīs it.

May 21, 2013, 10:42
#7
Senior Member

Meimei Wang
Join Date: Jul 2012
Posts: 494
Rep Power: 8
Quote:
 Originally Posted by keeper You did it right. The problem is that it is not supported by GUI. That is why you have error message. So you can suppress this message and run it without any troubles. You work in WB or in standalone? Anyway both options will results in same way. So just supress it and thatīs it.
What do you mean by 'supress it'?
__________________
Best regards,
Meimei

May 21, 2013, 11:40
#8
Senior Member

Mr CFD
Join Date: Jun 2012
Location: Britain
Posts: 312
Rep Power: 7
Quote:
 Originally Posted by Anna Tian What do you mean by 'supress it'?
I think he means suppress it in the expert parameters.

 May 22, 2013, 03:55 #9 Senior Member   Join Date: Jul 2010 Posts: 152 Rep Power: 8 just click with the right button onthose messages in CFX Pre. I deal also with anisotropic conductivity but for solids. I do it exactly like that and it works.

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