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Coil heating simulation
Posted Apr 4, 2024, 4:40 p.m. EDT 2 Replies
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Hello,
I have been trying to model the following: the coil with ~ 100 windings where I pass the current and see how it heats up due to Joule heating. I try to use HEAT FLUX function where I estimate heat transfer coefficient between surronding air and wire material(copper). The challenge I am facing is following:
I can't make 100 or so windings if I just define helix in geometry(takes too much computational power), so instead I decided to create hollow cylinder and define it as homogenized multi-turn circular coil with proper parameters. However, when I run the simulation(I am running stationary case), the temperature of the coil always gets down(goes up) to external temperature defined in HEAT FLUX. As I understood from multiple tries, circular current defined in the coil doesn't produce and heat in the simulation, hence coil warms up(cools down) to external temperature.
The only way I managed to get it working is to define helix and define ground and terminal on it(through electric currents branch). However as I mentioned I can't make ~100 windings in that setup.
To sum it up, what is the way to calculate Joule heating in the coil(with ~100 or more windings) that has been defined through Magnetic Fields --> coil function?
I greatly appreciate any feedback on this matter. Thank you so much for your help!
Hello Guga Khundzakishvili
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I have the same challenge. I am using the coil compnent, which is convenient to simulate the magnetic effect of a coil. At the same time I can't figure out how to explore the heating effect of the coil on its surrounding. All the example videos I saw so far are with 3D models, which is calculationally expensive to use for coil simulation. Any idea would help. Thank you!
-------------------Dan I Ko
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Is this a straight solenoid coil? If that, then let's continue. Caveat: There is likely a way to do this very well, using some of the tools available in the recent versions of Comsol Multiphysics. But if I had to do this in the past, or with a less powerful computer, I would approximate the 100 turn coil as simply 100 circular loops, then model them in a 2D axisymmetric model. This huge simplification would likely bring the computational size within reach.
-------------------Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara