Re: Etesla6 math questions

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi Peter,

At 07:15 PM 2/3/2003 -0800, you wrote:
>Paul or Terry,
>               your replies have provided a lot of insight, but I've still got
>questions, starting with:
>
>6. what exactly are the known boundary conditions in Etesla6, now that
>    we agree on where the boundaries are (the enclosing sphere, and the
>    surface of the TC secondary and toroid).    It seems we know the voltage
>    of the toroid and the voltage along the secondary by assumption, but we
>    don't know either the voltage or the E-field at the sphere... it seems
>    you have to know all the boundary conditions to do SOR or similar...

E-Tesla6 assumes the areas around the coil are at zero volts.  It also 
assumes the primary and strike rails are grounded too.  The top sphere is 
charged to say one volt and the secondary is charged according to some 
voltage profile.  That totally defines all the boundaries:

http://hot-streamer-dot-com/andrewb/models/models.htm


>
>7. I always assumed Coulombs law was inverse square (like Newtonian gravity)
>    rather than just plain inverse, guess I never actually checked. Is there
>    a handy intuitive explanation.

I think it is.  But I always just used "Gausses law" stuff for 
E-Tesla.  Everything else just works out automatically...

Cheers,

         Terry

>
>
>until the next question,
>Pete Lawrence.
>
>(ps, Terry, I think Etesla6 could stand to have some more documentation,
>I do have the sources and the docs are really sparse. I'll be glad to write
>some if/when I finally understand it!)