Cropping of particles at boundaries for deposition for charge conservation #5649
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Only in Villasenor and Buneman current deposition in this commit
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The cropping should not be applied at PMC (symmetry) boundaries. Only at physical boundaries like conductors and insulators. |
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Now the crop is done relative to the grid indices. This may be better anyway since it avoids roundoff in the positions as they are used for interpolation.
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This modifies the deposition (and field gather), cropping particle orbits at the boundary of the domain for PEC and PMC boundaries. This is a simple way of achieving charge conservation as particles are absorbed at boundaries.
In input flag
particles.crop_on_PEC_boundarywas added to turn this feature on. It now defaults tofalse.Only in Villasenor and Buneman current deposition now. Can be extended to Esirkepov.
A second necessary change for charge conservation is to stop the particle orbits at the boundary, instead of reflecting them back into the domain, so that in the next time step the particles start at the boundary.