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How to use the material properties in Comsol
Posted Feb 24, 2018, 5:23 p.m. EST Electromagnetics, Low-Frequency Electromagnetics, Heat Transfer & Phase Change Version 5.2 0 Replies
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Hello!
I am still new to Comsol. Recently, I am running a thermoelectric model in Comsol. Some properties of the TE material like Bi2Te3 are temperature-dependent. That is, when I add the Bi2Te3 material from the material library, in the Material-->Properties table, the properties like Seebeck coefficient and thermal conductivity are given as a function of T(temperature), but in implicit format, like S(T) and k(T) as shown in the first figure attached.
Actually, my model involves two different TE materials, and I need to interpolate the properties from these two. So in the Thermoelectric Effect Part, for the Seebeck coefficient, I select User defined and give a function combining the Seebeck coefficients of the two materials. For Bi2Te3, I just directly use S(T), but when I run it, it turns out that the Comsol can not recognize the S(T), indicating that S(T) is unknown function or operator( second figure).
Can somebody tell me what is wrong? I am really confused.
Any help will be appreciated!
Hello Xiaoqiang Xu
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