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Can 3D geometry only simulate 1/4 of it?

Posted Jun 23, 2016, 11:32 a.m. EDT Geometry Version 5.2 3 Replies

Sandra Wang
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I have a geometry which in not asymmetry 2D, but symmetry in mirror. In order to reduce the computation power, may I only simulate 1/4 of it? Thank you for your attention!
3 Replies Last Post Jun 25, 2016, 10:13 a.m. EDT
Daniel Connelly
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Posted: 8 years ago Jun 24, 2016, 1:14 p.m. EDT
Yes -- these are standard reflective boundary conditions. However, it won't work for solutions which allow for antisymmetric solutions, like eigenmode analysis or Schrödinger's Equation. You'd only solve for 1/4 of the available solutions.
Yes -- these are standard reflective boundary conditions. However, it won't work for solutions which allow for antisymmetric solutions, like eigenmode analysis or Schrödinger's Equation. You'd only solve for 1/4 of the available solutions.
Jeff Hiller COMSOL Employee

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Posted: 8 years ago Jun 24, 2016, 2:02 p.m. EDT
There are ways of handling even antisymmetric solutions.
For a solid discussion of this, see www.comsol.com/support/knowledgebase/1038/
Best,
Jeff
There are ways of handling even antisymmetric solutions. For a solid discussion of this, see https://www.comsol.com/support/knowledgebase/1038/ Best, Jeff
Daniel Connelly
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Posted: 8 years ago Jun 25, 2016, 10:13 a.m. EDT
Thanks for posting that! So to calculate the number of modes you'd need all combinations of symmetric and antisymmetric boundaries (2ⁿ, where n is the number of boundaries), unless certain combinations are degenerate.

This still wouldn't work with "pie-slice" examples like the one on that web page, though.
Thanks for posting that! So to calculate the number of modes you'd need all combinations of symmetric and antisymmetric boundaries (2ⁿ, where n is the number of boundaries), unless certain combinations are degenerate. This still wouldn't work with "pie-slice" examples like the one on that web page, though.

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