Custom material properties for a copper from table

nrbrt · May 23, 2025, 11:35

Hi,
I would like to simulate the behavior of a copper heat exchanger at cryogenic temperatures.

In such environments, the material properties change significantly. A common approach is to define tables with values for each Kelvin, specifying the corresponding:
Temperature Specific Heat Capacity Thermal Conductivity Electrical conductivity

Could someone provide an example of a properly

Code:

.CCL

file for this purpose? I can fill with the values, just I dont know the correct syntax. Thank you!

ghorrocks · May 24, 2025, 06:31

If the properties are a function of temperature only then it is easy to do. In CFX-Pre use a 1-D interpolation function. They are quite simple to set up so you should work it out quickly. Also the CFX-Pre documentation can help.

nrbrt · May 26, 2025, 13:11

In the meantime I found a way. I put it here in case. This is for copper with RRR=10 and it contains: Resistivity, Thermal conductivity, Specific heat vs. temperature . You can have more points for higher resolution.

ghorrocks · May 26, 2025, 19:03

It is much easier if you do it as a 1D interpolation function.

May 23, 2025, 11:35	Custom material properties for a copper from table	#1
nrbrt New Member Join Date: Sep 2023 Posts: 7 Rep Power: 3	Hi, I would like to simulate the behavior of a copper heat exchanger at cryogenic temperatures. In such environments, the material properties change significantly. A common approach is to define tables with values for each Kelvin, specifying the corresponding: Temperature Specific Heat Capacity Thermal Conductivity Electrical conductivity Could someone provide an example of a properly Code: .CCL file for this purpose? I can fill with the values, just I dont know the correct syntax. Thank you!

May 24, 2025, 06:31		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,968 Rep Power: 145	If the properties are a function of temperature only then it is easy to do. In CFX-Pre use a 1-D interpolation function. They are quite simple to set up so you should work it out quickly. Also the CFX-Pre documentation can help. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

May 26, 2025, 19:03		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,968 Rep Power: 145	It is much easier if you do it as a 1D interpolation function. Opaque likes this. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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