Menu

Discussion Forum

New Discussion
Filtra

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 The information provided may be out of date.

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

How to create an ambient magnetic field

Posted 2 feb 2012, 15:08 GMT-5 Low-Frequency Electromagnetics, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 4.2 2 Replies

Shuo Cheng
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

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 2 feb 2012, 16:18 GMT-5
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2 feb 2012, 16:14 GMT-5
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
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2 feb 2012, 16:18 GMT-5
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.

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.

Suggested Content