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Magnet - Magnetic and Electric Fields

Posted Jun 14, 2024, 3:26 p.m. EDT Electromagnetics, Materials, Physics Interfaces 1 Reply

Tesla Pratt
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The below post is related to an archived discussion

Hello,

I am trying to create a stationary magnet within the Magnetic and Electric Fields setting. I have tried using Ampere's Law and Current Conservation for each pole of the magnet, but keep getting a singular matrix error.

I have seen lots of examples of how to create magnets in the (MF) setting, but I can't figure out how to create it in (MEF).

Any recommendations would be greatly appreciated!

Thanks, Tesla

1 Reply Last Post Jun 14, 2024, 4:08 p.m. EDT
Robert Koslover Certified Consultant
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Posted: 10 months ago Jun 14, 2024, 4:08 p.m. EDT
Updated: 10 months ago Jun 14, 2024, 4:12 p.m. EDT

I've attached an example, using the MEF formulation per your request. I don't claim that this is a great model per se, but it doesn't give any computational errors! So take a look at it. FYI, I chose the source of the magnet's field to be a bulk magnetization (rather than try to specify poles). By the way, if you have air or empty space in your problem, be sure to assign it a small but non-zero electrical conductivity!

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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
I've attached an example, *using the MEF formulation* per your request. I don't claim that this is a great model per se, but it doesn't give any computational errors! So take a look at it. FYI, I chose the source of the magnet's field to be a bulk magnetization (rather than try to specify poles). By the way, if you have air or empty space in your problem, be sure to assign it a small but *non-zero* electrical conductivity!

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