Discussion Forum

Forum Home

New Discussion

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 The information provided may be out of date.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.

Theory Magnetic Fields Interface. A doubt

Posted May 25, 2011, 6:49 a.m. EDT Low-Frequency Electromagnetics Version 4.1, Version 4.2 1 Reply

Isabel Gil

Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Dear COMSOL users,

I am working with Magnetic Fields (mf) and I have read the part of the guide titled by "Theory for the Magnetic Fields Interface" and there, it is said that the term involving the velocity (v) only applies in the 2D and axisymmetric formulations. My question is why it must be applied in this cases and what it means.

On the other way, meanwhile in Frequency Domain Equation it is used the term der(D)/der(t), why isn't it used in Transient Equation?

Finally, it isn't really applied the Faraday Law that says: E=-grad(V)-der(A)/der(t) but E=- der(A)/der(t), why is it taken grad(V)=0?

Thanks in advance.
Best regards,
Isa

1 Reply Last Post May 25, 2011, 7:06 a.m. EDT

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

Hi

the Lorentz velocity terms were not there for all geometries in ACDC 4.1, they are back also in 2D-axi now in v4.2

--
Good luck
Ivar

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.

Discussion Forum

Theory Magnetic Fields Interface. A doubt

Suggested Content