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Joule heating

Posted Nov 12, 2012, 7:18 a.m. EST Low-Frequency Electromagnetics Version 4.3 3 Replies

João Azevedo
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Hello,
I am trying to study the joule heating by applying a current density to a material (simple block). I know how to do this by applying a ground and potential boundaries to the block (making a current pass through it) and it heats. What I want to do is, instead of applying a potential difference, I want to define the current that passes along the material. Is it possible? Thank you.
3 Replies Last Post Nov 14, 2012, 1:44 a.m. EST
Eric Lämmel
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Posted: 1 decade ago Nov 12, 2012, 10:06 a.m. EST
Apply a Boundary Current Source node at the boundary that has Electric Potential node in your model.
Apply a Boundary Current Source node at the boundary that has Electric Potential node in your model.
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Nov 12, 2012, 2:25 p.m. EST
Hi

I would add: and disable the "electric potential" or "terminal" node, as you should only keep one of these three active at the sime time on the same boundary

--
Good luck
Ivar
Hi I would add: and disable the "electric potential" or "terminal" node, as you should only keep one of these three active at the sime time on the same boundary -- Good luck Ivar
Eric Lämmel
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Posted: 1 decade ago Nov 14, 2012, 1:44 a.m. EST
Of course :)

But I think COMSOL overwrites the former with the latter BC by default, so it should work anyway...
Of course :) But I think COMSOL overwrites the former with the latter BC by default, so it should work anyway...

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