EMAT webinar example reproduction

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Hi everyone,

I am trying to reproduce the electromagnetic acoustic transducer example presented in this webinar : https://www.comsol.com/video/modeling-nondestructive-testing-methods-in-comsol-multiphysics I do not have access to the comsol file so I have reproduced the file from the video. The results are not adequate and I do not really know what is causing that : the solid mechanics quantities such as displacement are 0 everywhere. I am not used to multiphysics problems in comsol.

I have attached my file if needed.

Sarah



1 Reply Last Post 9 oct. 2026, 20:10 UTC−5

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Posted: 1 hour ago 9 oct. 2026, 20:10 UTC−5

The problem is that your bias magnet isn't magnetic. Try changing the Magnetization Model to Magnetization and set a nonzero magnetization value in the z direction. (There may be better ways to specify this but I don't know EMATs well enough to say).

The problem is that your bias magnet isn't magnetic. Try changing the Magnetization Model to Magnetization and set a nonzero magnetization value in the z direction. (There may be better ways to specify this but I don't know EMATs well enough to say).

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