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how to define my own inductive heating branch?

Posted 26.10.2011, 08:11 GMT-4 Low-Frequency Electromagnetics, Heat Transfer & Phase Change Version 4.2 2 Replies

Vincent Zhang
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Hi everybody:

I am doing inductive heating, but the original "inductive heating" branch have a little problem that it have to study the thermal problem in the air region, thus first waste computational time (I don't care the temperature distribution in the air); second it is hard to define the boundary condition between the work-piece and air (I want to use the heat transfer coefficient, but it can not define in the inner boundary).

Therefore, I want to use magnetic and heating transfer to build my "inductive heating", studying magnetic frequency in all domains, then use the current density in heat generation in heat transient study in the work-piece only.

However, when I add magnetic and heating transfer in solid together, there is not frequency - transient study type that was in the original "inductive heating" branch.

Thank you for helping me!
2 Replies Last Post 28.10.2011, 17:12 GMT-4
Vincent Zhang
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Posted: 1 decade ago 28.10.2011, 08:09 GMT-4
Sorry for disturbing, but I think I have to let more people to see this problem.


Please help me.

Thanks a lot.
Sorry for disturbing, but I think I have to let more people to see this problem. Please help me. Thanks a lot.
Marcus
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Posted: 1 decade ago 28.10.2011, 17:12 GMT-4
If I understand, it sounds like you are doing everything correctly.

For instance, use the Magnetic Fields physics module to obtain the heating term (mf.Qh). Then use the Heat Transfer in Solids module to perform a thermal analysis by assigning mf.Qh in the Heat Source node, for just the solid domain.

Perhaps the problem is that a Frequency Domain study type is not visible by default since you have added the Heat Transfer physics.

Expand the node which says something like "Other Study Types", and you should see it there.

I do not have access to Comsol at the moment, but will verify this later.

Good luck
If I understand, it sounds like you are doing everything correctly. For instance, use the Magnetic Fields physics module to obtain the heating term (mf.Qh). Then use the Heat Transfer in Solids module to perform a thermal analysis by assigning mf.Qh in the Heat Source node, for just the solid domain. Perhaps the problem is that a Frequency Domain study type is not visible by default since you have added the Heat Transfer physics. Expand the node which says something like "Other Study Types", and you should see it there. I do not have access to Comsol at the moment, but will verify this later. Good luck

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