Calculating Emax in concentric cylinder

AI Thread Summary
The formula for calculating the maximum electric field, Emax, in a concentric cylinder is Emax = V/a ln(b/a). The discussion raises a question about how this formula adapts when there are three inner cylindrical electrodes, indicating a more complex scenario. The need for precision in the solution is highlighted, with suggestions for using simulation software like COMSOL for accurate modeling. The participant mentions using FEMM 4.2 software, which may have limitations compared to more advanced options. Access to electric field modeling software is emphasized as crucial for tackling the complexities of the problem.
donkitano123
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The general formula to calculate maximim electric, Emax in concetric cylinder is Emax= V/a ln (b/a).
But how does the formula differentiate if there are 3 inner cylindrical electrode?
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donkitano123 said:
The general formula to calculate maximim electric, Emax in concetric cylinder is Emax= V/a ln (b/a).
But how does the formula differentiate if there are 3 inner cylindrical electrode?
View attachment 110125
Welcome to the PF. :smile:

That would look to be a much more complicated problem than just concentric cylinders. How exact of a solution do you need? Do you have access to simulation software like COMSOL?

https://www.comsol.com/acdc-module
 
Thanks for the reply :smile:

I only have FEMM 4.2 software.
 
donkitano123 said:
Thanks for the reply :smile:

I only have FEMM 4.2 software.
Are you in university? What is the context of this question? Do you know anybody with access to electric field modeling software?
 

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