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Volume at constant temperature

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Dear all,

I am using the heat transfer module to simulate heat flow through a rod. The rod is connected to a piece of copper that is held at a constant temperature. The problem is that Comsol only gives me the option of selecting surfaces to fix t a constant temperature, and not a volume. Does anyone know how to get around this problem? The rod and copper are joined to eachother with a union.

Thanks

1 Reply Last Post 28 mar 2013, 16:33 GMT-4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

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Posted: 1 decade ago 28 mar 2013, 16:33 GMT-4
Hi

If you force a constant temperature over a full domain (volume), you can as well ignore it and force a constant temperature at its interfaces.
Think over it, your copper part interacts with the external temperature over its' boundaries, it's not really physical to impose a constant temperature and then apply a diffusion type equation on the domain, it is about a writing 0=0, not the most useful equation, or ?

--
Good luck
Ivar
Hi If you force a constant temperature over a full domain (volume), you can as well ignore it and force a constant temperature at its interfaces. Think over it, your copper part interacts with the external temperature over its' boundaries, it's not really physical to impose a constant temperature and then apply a diffusion type equation on the domain, it is about a writing 0=0, not the most useful equation, or ? -- Good luck Ivar

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