Multiple Thermal Conductivity for a Material at different temperature
I am trying to create a material in ANSYS that has a different thermal conductivity at different temperatures. I tried the following:
Creating a function "Function 1" with my data: -Argument Units: K -Output Units : W m^-1 K^-1 Creating an expression "Expression 1" linked to the function: -Expression 1= Function 1(K) This gives me the following error: Bad expression value 'Expression 1' detected in parameter 'Thermal Conductivity' in object '/LIBRARY/MATERIAL:Zirconium/PROPERTIES/THERMAL CONDUCTIVITY'. CEL error: The following unrecognised name was referenced: K. Which basically says that I can't use K as the input to my function? |
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from the info you have given, it seems that you have tried to modify an element's properties from the MATERIALs library. Something is wrong with you re-definition. Could you provide additional info - what module of ANSYS do you use? Possible solutions for the definition of temperature dependence of thermal conductivity: 1. if you use Transient module, you can specify temperature dependence of thermal conductivity in a Table form in the section 'Engineering Data'. 2. if you use FLUENT module, you can define a User-Defined Function (code it in C) and either compile or interpret it, and then use this function in material's properties specification. (There is a reference guide on how to make the User-Defined Functions in FLUENT). regards, |
This looks like it is in CFX. Try putting square brackets around K. Like this:
[K] |
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