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Joule heating in superconductor

Posted Dec 7, 2009, 1:15 a.m. EST 2 Replies

Won Hee Sung
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Hi~

I have a problem in Joule heating in superconductor
The Superconductor's resistivity depend on Temperature and "current density" both!

rho = f(T,J)

how can i handle current density?
Is it available to use expression of current density to put in rho value?

please help me~
2 Replies Last Post Jul 30, 2010, 10:27 a.m. EDT
COMSOL Moderator

Hello Won Hee Sung

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Luis Gomez
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Posted: 1 decade ago Jul 16, 2010, 9:50 p.m. EDT
Hi!,

It is extrange no one have responded to your question. I also have similar question, but I also want to add the magnetic field dependance, so rho = f(T,J,B)

Good luck!


Hi~

I have a problem in Joule heating in superconductor
The Superconductor's resistivity depend on Temperature and "current density" both!

rho = f(T,J)

how can i handle current density?
Is it available to use expression of current density to put in rho value?

please help me~


Hi!, It is extrange no one have responded to your question. I also have similar question, but I also want to add the magnetic field dependance, so rho = f(T,J,B) Good luck! [QUOTE] Hi~ I have a problem in Joule heating in superconductor The Superconductor's resistivity depend on Temperature and "current density" both! rho = f(T,J) how can i handle current density? Is it available to use expression of current density to put in rho value? please help me~ [/QUOTE]
Sven Friedel COMSOL Employee

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Posted: 1 decade ago Jul 30, 2010, 10:27 a.m. EDT
Hi,

this is sure possible with COMSOL. You can define functions of several arguments. The functions can be analytical where the number of arguments is practically not limited, but you can also define interpolation functions of at least 3 variables.

If you are using COMSOL 4.0a, please start Help > Documentation and seah for "Defining an Interpolation Function",
there spatial variables are given as an example but the function can be interpolated depending on a generic set of 3 input variables, e.g. T,J and B.


Best regards,
Sven
Hi, this is sure possible with COMSOL. You can define functions of several arguments. The functions can be analytical where the number of arguments is practically not limited, but you can also define interpolation functions of at least 3 variables. If you are using COMSOL 4.0a, please start Help > Documentation and seah for "Defining an Interpolation Function", there spatial variables are given as an example but the function can be interpolated depending on a generic set of 3 input variables, e.g. T,J and B. Best regards, Sven

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