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Magnetic field of current passing through a 2D sheet

Posted Jan 8, 2017, 2:47 a.m. EST Low-Frequency Electromagnetics Version 5.2 2 Replies

Abraham Mansouri
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Hi all

I modeled a magnetic field of current passing through 2D sheet, the theoretical solution gives positive magnetic field on one side and negative magnetic field on the other side. Note that the magnetic field outside the sheet is constant, independent of the distance from the sheet.

I verified the magnetic field value by comsol however in comsol both sides of sheet magnetic field is positive ?!

can someone help me why magnetic field is positive on both side ? what is it missing here?

Regards
Abraham
2 Replies Last Post Jan 10, 2017, 2:50 a.m. EST
Robert Koslover Certified Consultant
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Posted: 8 years ago Jan 8, 2017, 9:51 a.m. EST
There are many things that could have gone wrong. What quantity did you plot? Did you accidentally plot the magnitude of the field rather than a vector component? And if you did choose a vector component, did you choose one perpendicular to the direction of the current? Is the current actually flowing in the direction that you thought it was? Also, did you include a computational space around the sheet, and provide appropriate boundary conditions on its boundaries? I suggest you post your model to the forum.
There are many things that could have gone wrong. What quantity did you plot? Did you accidentally plot the magnitude of the field rather than a vector component? And if you did choose a vector component, did you choose one perpendicular to the direction of the current? Is the current actually flowing in the direction that you thought it was? Also, did you include a computational space around the sheet, and provide appropriate boundary conditions on its boundaries? I suggest you post your model to the forum.
Abraham Mansouri
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Posted: 8 years ago Jan 10, 2017, 2:50 a.m. EST
Thank you so much Dr. Robert, I was actually plotting the norm of magnetic field, when I plotted the correct component of the magnetic field, it turned out to be correct being positive and negative on each side

Thanks again!
Abraham
Thank you so much Dr. Robert, I was actually plotting the norm of magnetic field, when I plotted the correct component of the magnetic field, it turned out to be correct being positive and negative on each side Thanks again! Abraham

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