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Contact Impedance and Heat Transfer

Posted May 31, 2012, 1:58 a.m. EDT Low-Frequency Electromagnetics, Heat Transfer & Phase Change Version 4.2, Version 4.2a 2 Replies

Jorge
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Hi,

I'm modelling two hangerbars (Electrowinning) and a busbar, and I want to calculate the heat produced by the contact between the hangerbar and the busbar. It works, until I introduce the heat transfer model. Apparently, the Contact Impedance from the AC/DC model doesn't work with the Heat Transfer, and I can't calculate the power losses in the contact. I have to say that the model gives me a result, but doesn't consider the power losses in the contact area.

One way to solve this it's making a solid contact area, as a new domain, but I want to work only with those areas (boundaries) and not a hall domain.

Can someone help me with this, or pointing to an easier way to solve this particular problem?

Thanks.

Jorge Henriquez
2 Replies Last Post May 31, 2012, 4:09 p.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago May 31, 2012, 2:12 a.m. EDT
Hi

I'm not sure it's this but it might be that you need to introduce the surface contact dissipated power explicitely by a surface heat source in the HT

Have you checked carefully the Equation view. With multiphysics one need to carefully check all elements, in particular at the interfaces

--
Good luck
Ivar
Hi I'm not sure it's this but it might be that you need to introduce the surface contact dissipated power explicitely by a surface heat source in the HT Have you checked carefully the Equation view. With multiphysics one need to carefully check all elements, in particular at the interfaces -- Good luck Ivar
Jorge
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Posted: 1 decade ago May 31, 2012, 4:09 p.m. EDT
Thansk, but that wasn't it. I solve it changing the surface to a domain, and it works fine.

Thanks for the help anyway.
Thansk, but that wasn't it. I solve it changing the surface to a domain, and it works fine. Thanks for the help anyway.

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