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How to tell if two boundaries touch?

Posted Jun 23, 2020, 2:56 p.m. EDT Low-Frequency Electromagnetics, Geometry, Materials Version 5.5 1 Reply

Emma Kerr
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I'm trying to create a coil as shown in this article:

https://www.comsol.com/blogs/modeling-coils-in-the-acdc-module/

How do I check if the boundaries are touching so I can pass current through my inductor? I've linked my structure below.

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1 Reply Last Post Jun 24, 2020, 6:27 a.m. EDT
Alexis Prel
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Posted: 4 years ago Jun 24, 2020, 6:27 a.m. EDT

Hi Emma,

I am not exactly sure why you need this detection to be automatic, but if you do, maybe you can work out a solution by defining selections

  1. Definitions > Selections > Explicit for the first boundary
  2. Definitions > Selections > Explicit for the second boundary
  3. Definitions > Selections > Intersection and in the Input Entities field add the two boundaries

Then in your equations maybe you can define the term that models current flow and make it apply only to this selection.

Hi Emma, I am not exactly sure why you need this detection to be automatic, but if you do, maybe you can work out a solution by defining selections 1. `Definitions` > `Selections` > `Explicit` for the first boundary 2. `Definitions` > `Selections` > `Explicit` for the second boundary 3. `Definitions` > `Selections` > `Intersection` and in the `Input Entities` field add the two boundaries Then in your equations maybe you can define the term that models current flow and make it apply only to this selection.

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