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Maxwell Surface Stress Tensor

Posted Dec 10, 2012, 6:30 a.m. EST Low-Frequency Electromagnetics, Results & Visualization Version 4.3a 1 Reply

Ding Wang
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Hi all,

I'm trying to calculate the magnetic attraction force between two objects in COMSOL 4.3a, by using Maxwell Stress Tensor.

I found four possible Maxwell functions to calculate the force:

Maxwell upward surface stress tensor,
Maxwell downward surface stress tensor,
Maxwell upward magnetic surface stress tensor and
Maxwell downward magnetic surface stress tensor.

Please can anyone tell me what is the difference between them?
Thank you.
1 Reply Last Post Dec 10, 2012, 7:47 a.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Dec 10, 2012, 7:47 a.m. EST
Hi

up and down are w.r.t the domain (up = outwards, down = into a domain)
But to get the forces it's best to use the domain Force node that defines the equations for you
And then to check the equations COMSOL uses internally (turn on the equation view in the preferences)

--
Good luck
Ivar
Hi up and down are w.r.t the domain (up = outwards, down = into a domain) But to get the forces it's best to use the domain Force node that defines the equations for you And then to check the equations COMSOL uses internally (turn on the equation view in the preferences) -- Good luck Ivar

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