Solving COMSOL Particle Tracing Problem with Boundary Coordinates

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SUMMARY

The discussion centers on utilizing the Boundary Coordinates feature in COMSOL for particle tracing, specifically for tracing electrons from defined points on a grounded spherical protrusion. The user, Lucian, is unable to locate the Boundary Coordinates option as described in the User's Guide, particularly on page 521. It is confirmed that the Boundary Coordinates feature is only applicable in 2D simulations, which may explain the user's difficulty in finding the option in a 3D context.

PREREQUISITES
  • Familiarity with COMSOL Multiphysics software
  • Understanding of particle tracing techniques
  • Knowledge of 2D vs. 3D simulation environments
  • Basic concepts of electric potential and grounded surfaces
NEXT STEPS
  • Review the COMSOL User's Guide for particle tracing in 2D
  • Explore the differences between 2D and 3D particle tracing in COMSOL
  • Learn how to set up boundary conditions in COMSOL for particle tracing
  • Investigate troubleshooting techniques for missing features in COMSOL
USEFUL FOR

Researchers and engineers working with COMSOL Multiphysics, particularly those focusing on particle tracing simulations and electric field analysis in 2D environments.

LucianImago
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Hello all,

I have a small problem with COMSOL. I am trying to use the particle tracing feature, more precisely I want to use the boundary coordinates to specify where are the points from which to trace the electrons. From what I understand in the User's Giude, the Boundary Coordinates feature should be in the particle tracing tab in the postprocessing window. According to the giude (page 521) "To use boundary coordinates, click the option button to the left of the Boundary Coordinates button; then click that button to open the Boundary Coordinates dialog box." The problem is I cannot find this in the program. I hope someone shine some light on.

As for what I am trying to do is a simple exercise so I get used to these settings for particle tracing. I have two plates with a spherical protrusion on each, such that one spherical protrusion is right below the other one. One of the plates is grounded and the other one is set at a fixed potential. I would like to be able to define a circular region on the grounded sphere as the starting points for lunching electrons and see the traces.

Cheers,

Lucian
 
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i thought your case is 3D, but Boundary coordinates is in 2D
 

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