My Problem:
I have a condensator with a small non-conducting dielectric wire in between.
I try to get out how a conductive shell around the wire shields the electric field in the wire.
I tried electric current model, but the results don't make much sense, for example the epsilon (permittivity) of 12 in the wire is totally ignored. Also the ratio between conductivity of air (cant be set to 0) and the shell is important.
So I tried to combine electric current AND electrostatic model by giving the same name for the both potentials (V). It seemed to work, but if the conductivity gets around 1e-10 S/m it doesn't make sense any more. Suddenly the field in this shell is higher than outside and for smaller conductivities smaller again. Then it is the same result as in an electrostatic model only.
So my question: Is my thought of combining the two physics generally wrong or do I just use it in the wrong way?
Thanks for answers!
PS: My version is 4.2. Sorry, in my model some things are german.