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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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change in thermal conductivity with respect to temperature

Posted 2014年7月28日 GMT-4 18:49 Heat Transfer & Phase Change, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 4.3a, Version 4.3b 4 Replies

Karan Bikkannavar
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Hello,

Is it possible to simulate a case wherein, the thermal conductivity of the material changes with respect to the temperarture ?

Please let me know.
4 Replies Last Post 2014年7月29日 GMT-4 16:51
Pieter Westerik
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Posted: 10 years ago 2014年7月29日 GMT-4 02:46
Yes, make the thermal conductivity user defined and put for the value of the thermal conductivity some formula in which you use 'T' (probably) for the temperature. Or you can put your formula in the material property of the relevant material.
Yes, make the thermal conductivity user defined and put for the value of the thermal conductivity some formula in which you use 'T' (probably) for the temperature. Or you can put your formula in the material property of the relevant material.
Karan Bikkannavar
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Posted: 10 years ago 2014年7月29日 GMT-4 15:26
thank you for the reply.
The actual problem is that if its possible to simulate thermal conductivity change with temperature change.!

I am running a Joule heating simulation to see temperature distribution on a boundary(Aluminum material) using 'step' input/function for a specific time period. I obtain the temperature results for every time steps.
Next, I want to run a case wherein Thermal conductivity of Aluminum changes with temperature change at every time step.

Can it be done??

thank you for the reply. The actual problem is that if its possible to simulate thermal conductivity change with temperature change.! I am running a Joule heating simulation to see temperature distribution on a boundary(Aluminum material) using 'step' input/function for a specific time period. I obtain the temperature results for every time steps. Next, I want to run a case wherein Thermal conductivity of Aluminum changes with temperature change at every time step. Can it be done??
Josh Thomas Certified Consultant
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Posted: 10 years ago 2014年7月29日 GMT-4 15:52
Yes. You can specify temperature dependent material properties. In your case, simply make your thermal conductivity a function of the temperature variable, T.

--
Best regards,
Josh Thomas
AltaSim Technologies
Yes. You can specify temperature dependent material properties. In your case, simply make your thermal conductivity a function of the temperature variable, T. -- Best regards, Josh Thomas AltaSim Technologies
Karan Bikkannavar
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Posted: 10 years ago 2014年7月29日 GMT-4 16:51
Thank you for the quick reply.
Thank you for the quick reply.

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