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 The information provided may be out of date.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.
Difference between normJ and Jphi
Posted 31.07.2012, 04:01 GMT-4 Low-Frequency Electromagnetics, Results & Visualization Version 4.3 1 Reply
Please login with a confirmed email address before reporting spam
Hello,
in a 2D AC/DC (MF, axisymmetric) study I inetegrat over a coil surrface. (The coil is current driven. I use single turn coil).
When I inegrate over normJ the value ist wrong (not the same I put in the coil)
When I inegrate over Jphi the value is right.
My question: What is the reason for?
Greets
André Dietrich
in a 2D AC/DC (MF, axisymmetric) study I inetegrat over a coil surrface. (The coil is current driven. I use single turn coil).
When I inegrate over normJ the value ist wrong (not the same I put in the coil)
When I inegrate over Jphi the value is right.
My question: What is the reason for?
Greets
André Dietrich
1 Reply Last Post 02.08.2012, 13:38 GMT-4
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi
Have you checked the Comsol equation of normJ, and tried a plot of the components ?
Normally, in 2D axi the external current is defined as normal to the paper hence its a pure Jphi, as the norm from my understanding includesalso Jr and Jz too, hence gives potentially a different result.
But as I'm not by my Comsol WS so I cannot check it out myself and one should always carefully check such issues on a simple model where one can write out the results analytically
--
Good luck
Ivar
Have you checked the Comsol equation of normJ, and tried a plot of the components ?
Normally, in 2D axi the external current is defined as normal to the paper hence its a pure Jphi, as the norm from my understanding includesalso Jr and Jz too, hence gives potentially a different result.
But as I'm not by my Comsol WS so I cannot check it out myself and one should always carefully check such issues on a simple model where one can write out the results analytically
--
Good luck
Ivar