Meshing performance issue for perforated plate with ~21,600 holes

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I am trying to mesh a 3D perforated plate with ~21,600 small holes (diameter = 1. mm , pitch = 1.1 mm) for an electrostatic study. The mesh either stalls near 99% or produces low-quality elements in narrow regions. I found discussions in COMSOL Forum about meshing small gaps and holes causing issues (e.g., "Meshing issues - small gaps" and "The meshing don't go further than 99%"), but none address this scale (tens of thousands of perforations).

My questions:

  • Is there any recommended mesh strategy for highly repetitive perforations?
  • Should I use symmetry/periodicity or a unit cell approach?
  • How can I reduce mesh complexity without losing field accuracy?

Any advice on handling large scale perforated mesh in 3D would be appreciated.


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