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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Magnets not moving.

Posted Feb 18, 2013, 5:18 a.m. EST Low-Frequency Electromagnetics, Modeling Tools & Definitions, Parameters, Variables, & Functions, Results & Visualization, Studies & Solvers Version 4.3a 1 Reply

Martin Kandl
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Hey.

I have this problem:

I have two magnets oriented so that the north pole of one facing the North Pole 2 in the common axis X. Magnets are so close to each other should be
repel.
But magnets will not move.
Geometry in 2D.
What should I do to make magnets moved apart?

Thank you.
Goodbye.
1 Reply Last Post Feb 18, 2013, 7:38 a.m. EST
Sergei Yushanov Certified Consultant
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Posted: 1 decade ago Feb 18, 2013, 7:38 a.m. EST
Martin,

You need to add Moving Mesh (ale) physics and couple it to Global OEEs and DEAs (ge) interface as shown in Comsol example model:

www.comsol.com/showroom/documentation/model/13875/

Alternatively, you can couple Moving Mesh (ale) to Solid Mechanics (solid) physics as shown in the working example “permanent_magnet_moving_rod_sy.mph”:

www.comsol.com/community/forums/general/thread/28477/

Regards,
Sergei
Martin, You need to add Moving Mesh (ale) physics and couple it to Global OEEs and DEAs (ge) interface as shown in Comsol example model: http://www.comsol.com/showroom/documentation/model/13875/ Alternatively, you can couple Moving Mesh (ale) to Solid Mechanics (solid) physics as shown in the working example “permanent_magnet_moving_rod_sy.mph”: http://www.comsol.com/community/forums/general/thread/28477/ Regards, Sergei

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