Induced electric filed in a conductor volume
I am afraid that in a good conductor no electric field will exist "in its volume".
My conductor volume will be a human head. I want to stimulate this it by current coil.
Then the induced field is electromagnetic and the technique is named "eddy current in medicine". Try google, I found several papers on this.
I want to model transcranial magnetic stimulation in human head.
I am sorry but I have no experience with modeling such situation. Simple saline models of tissue do not work for muscles, so I do not understand how the complex brain tissue can be modeled. Nobody knows about its conductivity and other parameters.
I have studied microwave radiometry applications to detect in-tissue temperature caused by hyperthermy. Saline and other phantoms worked but in a real tissue nothing worked.
I wish you a good luck in your effort.