For this scenario, do you think it is best if I switch my coordinates such that the x is along the length of the wire? Will then, all the blocks be equivalent?
As far as I remember (please, recheck the manual) the unit cell is not partitioned in X, then partitioned into ProcessorY in Y and NumOfProcessors/ProcessorY in Z direction.
So I think you need to orient the wire along Y and use ProcessorY equal to amount of processors on which you run the job (i.e. not to partition in Z) - this would result in cutting the wire into ProcessorY equivalent pieces along the wire, each containing piece of the wire and lots of vacuum.
For any other direction of the wire you would end up with part of the block containing just vacuum i.e. completely wasted.
