Unexpected resistance doubling
Posted: 27 Mar 2020, 12:59
I am trying to compute electrical resistance with ElmerSolver 8.4. I always get twice the resistance I would expect, e.g. for a simple block of 1 x 1 x 1 material of conductivity 1 with a potential difference applied between the left and right faces I would expect a resistance of 1 according to R=length/(area*conductivity). StatCurrentSolver reports a resistance of 2.
In elmerfem/fem/tests/ComponentResistance/ a component of length 1, width 0.2 and conductivity 1.0e3 is reference normed to have a resistance of 0.01, twice what I would expect from 1/(0.2*1.0e3) = 0.005. So apparently this is the desired behaviour but I do not understand why.
In elmerfem/fem/tests/ComponentResistance/ a component of length 1, width 0.2 and conductivity 1.0e3 is reference normed to have a resistance of 0.01, twice what I would expect from 1/(0.2*1.0e3) = 0.005. So apparently this is the desired behaviour but I do not understand why.