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How to tell if two boundaries touch?

Posted 23.06.2020, 14:56 GMT-4 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 24.06.2020, 06:27 GMT-4
Alexis Prel
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Posted: 4 years ago 24.06.2020, 06:27 GMT-4

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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