[MechBoom]

My problem is that I know what I need to do, I'm just no sure how to code it.

Here's the integral I'm working with:

I=-ρ b∫ ∂V/∂n dl

rho and b are known constants. ∂V/∂n is the partial of Voltage normal to the plane and dl is obviously my differential length. With this integral I'm finding the corona current around a wire with fairly high current.

I'm basically having issues with two parts. The first is figuring out how to find the partial of voltage normal to my plane (wire). I have solved for the voltage field throughout my mesh but don't know how to single out the values around the wire. I know that the values at the wire itself all are normal to the plane so all I need to find are the magnitudes of each mesh cells voltage at the wire.

Secondly I'm having problems finding the differential length of my cells. I'm 99.9% sure that my mesh is uniform around the wire, so I'd probably only need the length of one cell.

I've been searching the source code info for any functions to solve for what I'm looking for but, so far I'm coming up dry. Any help that could be provided is much appreciated.