I want to explorer losses in cryogenic current leads. For start, the configuration includes a round thick copper wire (cylinder) that in one side is exposed to 300K and in the other is exposed to 20K. My problem is that I don't know where/how to assign current to my part/assembly. I tired to use EMS but it only gives me the possibility to assign fixed voltage (not current).
Would appreciate any help.
Because we are talking about special geometry, I need it to be done in a 3D mode and not as some kind of a circuit or something like this.