On 1/9/16 10:47 AM, Kelly Taylor wrote:
Here's an interesting question: if the concrete base is an effective ground
connection, do you get more value by placing the rods a rod length away from
the base?
Yes..
just on a superposition of currents basis, you'd say this, without
getting into non-linear effects.
The real question would be "how far"
If you think about the current flowing from a rod or block of concrete
or metal plate.. close up, it's sort of uniform, but in the "far field"
(to borrow an antenna term) it's spherical.
Rods are usually modeled as a line source: a cylinder with a hemisphere
on the bottom.
A plate (or a cube) would be a bit different. Maybe you could model it
as a hemisphere
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