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Virtual Electrical Connection
Posted 2021年7月22日 GMT-4 17:19 Electromagnetics, Electromagnetic Heating, Low-Frequency Electromagnetics Version 5.6 4 Replies
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Is it possible to connect two surfaces/boundaries virtually in COMSOL? I am studying joule heating as well as magnetic analysis of copper bars, and drawing interconnection wires/geometry for electrical connection is appearing to be difficult with the component under consideration. Is there a way I can choose two surfaces/boundaries and speciy that there is a zero electrical voltage difference in these? This in essence would provide a continous path of current in between two selected surfaces.
As an example, I am trying to connect (3) and (4) which are electrically isolated. Refer to the attachment.
Many thanks,
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When applying the Terminal or Potential boundary conditions you can select multiple boundaries.
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Thank you for suggestions, however, these boundaries cannot be applied inside the air domain. I have been trying to perform magentic analysis with box drawn to act as an air domain, and I was unable to connect two conductors inside the air box using the above suggested boundaries.
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So with the Joule heatign case, it is possible to select floating potential boundaries with value of 0V which ensures continuity of current as shown below.
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You seem to be talking about coupling the behavior (or the value of a quantity, such as potential) that is appearing in one location (such as on a boundary or surface) to a different location (such as a different boundary or surface). If so, you may wish to explore a Comsol feature called "coupling variables." Be aware that these can be tricky to use correctly. Right-click Definitions, choose "Non-local couplings," and consider the various choices offered to you. Consult the help system and application library for examples.
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