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How to create an ambient magnetic field

Posted Feb 2, 2012, 3:08 p.m. EST Low-Frequency Electromagnetics, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 4.2 2 Replies

Shuo Cheng
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I am trying to simulate my structure when immersed in a uniform magnetic field in a 3D block. I tried using inward flux density as the boundary condition of one face, and zero potential as the opposite face, but the simulation did not converge correctly, I got a message saying "Ill-conditioned preconditioner". The structure I am using is simply a piece of soft magnet with nonlinear permeability.
2 Replies Last Post Feb 2, 2012, 4:18 p.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Feb 2, 2012, 4:14 p.m. EST
Hi

cant you use the magnetisation M (ampere law node or main magnetic physics material law node)

--
Good luck
Ivar
Hi cant you use the magnetisation M (ampere law node or main magnetic physics material law node) -- Good luck Ivar
Shuo Cheng
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Posted: 1 decade ago Feb 2, 2012, 4:18 p.m. EST
Thanks. That could work in my case. But what if I also have a permanent magnet in my structure? It has a remanent flux density already.
Thanks. That could work in my case. But what if I also have a permanent magnet in my structure? It has a remanent flux density already.

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