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current and temperature dependent conductivity (sigma(T,j) )
Posted Aug 20, 2010, 4:00 a.m. EDT 1 Reply
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I am trying to model a conducting wire, where the conductivity depends both on the actual temperature and the actual current density. The temperature dependence is no problem. But I don´t know how to add the j dependecny.
I am using the electric current and heat tansfer modules. Is it only possible to solve linear equations?
Sigma(T,j) would be non-linear, as j also depends on the temperature.
Thanks for any help or comments
Hello Robert Werner
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I am actually trying to simulate the same nonlinear conductivity as in your case. I tried to simply make a conductivity that is a function of the current density, but I get an error when I do this. I know you posted your question a while ago, but I was wondering if you figured out how to implement this nonlinear conductivity in COMSOL. I would greatly appreciate any help or hints you can give me. Thanks