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Old   May 20, 2013, 21:03
Question Question about setting up thermal conductivity in CFX
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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'.
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Last edited by Anna Tian; May 21, 2013 at 05:16.
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Old   May 21, 2013, 05:53
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Quote:
Originally Posted by Anna Tian View Post
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.
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Old   May 21, 2013, 06:15
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Quote:
Originally Posted by hwangpo View Post
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?
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Old   May 21, 2013, 07:35
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maybe that is not reasonable. check it again
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Old   May 21, 2013, 07:41
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Quote:
Originally Posted by hwangpo View Post
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?
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Old   May 21, 2013, 11:20
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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.
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Old   May 21, 2013, 11:42
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Quote:
Originally Posted by keeper View Post
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'?
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Old   May 21, 2013, 12:40
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What do you mean by 'supress it'?
I think he means suppress it in the expert parameters.
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Old   May 22, 2013, 04:55
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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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