3D Symmetry of Model

Good afternoon all,

I am modelling two electrodes (tips facing each other) and the electric field between them. There are two Z-axis layers to each of the electrodes, measured in nanometers, whereas the width of the electrodes are measured in the hundreds of micrometers. Further, the electrode tips are half-cylinders. As you can imagine, this leads to some mesh-compiling problems (where it only compiles when the electrode width is set to a few dozen microns, instead of the desired hundreds), and I'm looking for solutions to be able to create and render a larger mesh.

The best hope to a solution (unless there are any you can recommend) seems to be symmetry, as both electrodes and the environment around them are identical.


I don't think 2D axial symmetry, extruded into 3D, would be able to suit my needs.

How would I do 3D symmetry along an axis? I've scoured the COMSOL forums, and while they are normally very helpful (thank you to everyone who takes the time to respond, you aren't just helping the OP) all the advice on symmetry is very vague and esoteric to a beginner like myself.

Thank you for your help,
Daniel