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joule heating via current density

Posted 28 giu 2011, 07:55 GMT-4 Heat Transfer & Phase Change, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 4.3 2 Replies

Oliver Vogel
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Dear comsol users,

I do a lot of modelling in AC/DC-Module. Now I have a axisymmetric model of a electromagnetic actuator in which I want to calcualte the heat distribution. The heat source is the coil of the actuator. I attempted to apply an external current density on the coil domain, but I doesn`t work at all. I also tryed in 3D mode, same problem. In 3D it is also possible to apply electric Potentials to boundaries. Doing so I get a temperaturdistribution as solution. But there is no way to do so in a axisymmetric model. I added my model so u can try yourself.

So my question is: Why isn´t a current flowing if an external current density is used on a domain?

Please help, best regards
Oliver

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2 Replies Last Post 2 ott 2015, 08:25 GMT-4
COMSOL Moderator

Hello Oliver Vogel

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William Steinberger
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Posted: 9 years ago 23 set 2015, 17:29 GMT-4
Hello,

Did you ever determine a method to do this analysis? I am currently trying to figure out a similar problem. I am trying to determine the heat produced from a coil with a constant current being applied.

Any help would be appreciated.

Very Respectfully,

Will
Hello, Did you ever determine a method to do this analysis? I am currently trying to figure out a similar problem. I am trying to determine the heat produced from a coil with a constant current being applied. Any help would be appreciated. Very Respectfully, Will
Oliver Vogel
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Posted: 9 years ago 2 ott 2015, 08:25 GMT-4
Hi Will,

sorry for late response, but I was unable to log in to my comsol account, maybe expired...

Actually I was able to do a thermal analysis.

I atached an exemplary model, wher you can see how I did it.

Maybe it is not exactly what you need but you can surely adapt some conditions and ideas.

Best regards

Oliver

P.S.: I am still working with version 4.3
Hi Will, sorry for late response, but I was unable to log in to my comsol account, maybe expired... Actually I was able to do a thermal analysis. I atached an exemplary model, wher you can see how I did it. Maybe it is not exactly what you need but you can surely adapt some conditions and ideas. Best regards Oliver P.S.: I am still working with version 4.3

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