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Hello,

i have some questions regarding the 'electrostatic force' calculation.

I'm doing a project where the force caused by an electric field is of big importance, therefore I tried to calculate this force using different ways to gain security.

First I'm using the Force Calculation from the electrostatic module itself, as domain I'm using the body where I want to know my forces (domain 1 in my case) -- seems straight forward.

Second, I implemented the standard formulation of the electrostatic force with maxwell stress tensors, where I did a line integration for the 4 edges of that body1, using the integrand:
epsilon0_const/2*(es.Ex^2-es.Ey^2) for the force in x direction and epsilon0_const/2*(es.Ey^2-es.Ex^2)

The results of this two methods differ completely, more than a factor of 10^4 ...

Please help me understanding what's wrong, while reading the help section I thought the Force Calculation in the ES module is nothing more than a ready to go implementation of the line integrals of the stress tensor?

thanks in advance :)