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Surface charge discontinuity between interior boundaries
Posted Dec 7, 2016, 4:37 p.m. EST Low-Frequency Electromagnetics Version 5.2a 0 Replies
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I want to create a periodic surface charge distribution on a crystal of lithium niobate by setting the physics up so that part of the crystal is positive and part is negative (conserving charge), and attaching a ground to the top of the crystal. The electric field looks like the file named 1.75. I have set up a graph to measure the surface charge density across the arc length on the top of the crystal (x), however when I look at the results, there is an obvious discontinuity over the boundaries between the positive and negative regions.
Why is this? There appears to be no discontinuity in the electric field, or the surface charge slices and surface plots and yet in the graph there is.
My initial though was that I have to manually define continuity conditions but apparently comsol does this automatically. If I did, I have been reading the manual and I can't figure it out. Help would be nice!
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Hello Joshua Viggiani
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