Coil heating simulation

Please login with a confirmed email address before reporting spam

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!


2 Replies Last Post Jul 28, 2024, 8:40 p.m. EDT
COMSOL Moderator

Hello Guga Khundzakishvili

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.


Please login with a confirmed email address before reporting spam

Posted: 3 months ago Jul 28, 2024, 7:49 p.m. EDT

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!

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!

Robert Koslover Certified Consultant

Please login with a confirmed email address before reporting spam

Posted: 3 months ago Jul 28, 2024, 8:40 p.m. EDT

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
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.

Reply

Please read the discussion forum rules before posting.

Please log in to post a reply.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.