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tangential field components?
Posted 2017年3月15日 GMT-4 06:09 Wave Optics Version 5.2a 0 Replies
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I have the following problem. I am modelling a 2D geometry (cross-section of a waveguide), and I need to compute Line integrals along a certain domain boundary of certain expressions which involve normal and tangential components of the field.
For instance, if I had a rectangular waveguide and wanted to compute the line integral of the normal component of electric field along one of the horizontal boundaries, I would simply use:
ewfd.Ey
as the expression under "Line Integration". This is a simple case, since Ey component is indeed normal to the boundary in this case.
However, in a more generic case (think for instance of a cylindrical waveguide), I can't just rely on Ex, Ey and Ez. Instead I would need to compute scalar product of the electric field vector (Ex,Ey,Ez) with the normal to the boundary unit vector.
Is there a smart way to do it in Comsol? I am sure there must be some embedded constants corresponding to different components of normal and tanjential vectors?
Hello Andriy Gorbach
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