I have a model in Comsol where some part has a fixed potential (-800v) while the other is grounded.

enter image description here

Does anyone have an idea on how to change the potential alternately from +800v to -800v with a waveform function?

$$V = V_0 \sin(\omega t)$$

Does this equation satisfy this query with a frequency given as 2.81 MHz?

  • $\begingroup$ Welcome to SciComp.Exchange. As it is right now, your question reads as asking about how to do a specific task in specific software. If that's the case I suggest that you ask this in Comsol Q&A. If not, if you are interested in boundary conditions for this problem I suggest that you rephrase it. $\endgroup$
    – nicoguaro
    May 8 at 17:36
  • $\begingroup$ Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. $\endgroup$
    – Community Bot
    May 9 at 13:48

1 Answer 1


There are several modules at Comsol, in order to have a variable potential you might have to use an AC module (I am not sure about the name). Also, maybe this link can help https://www.comsol.com/forum/thread/264191/Time-dependent-potential


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