Re: Streamer modeling

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Gerry,

I fiddled with curve fitting, but the functions were pretty messy and 
computer time intense.  The silly estimations I gave are "pretty close" and 
calculate like lightning.  I know there are far better fits and probably 
"near perfect" curves that could be made.  But for now, the simple silly 
thing works...

Cheers,

        Terry


At 10:31 PM 7/1/2005, you wrote:
> Hi Terry,
>
> The function C(x) looks like a exponential function.  I wonder if you 
> could plot the log of it and see if there is an exponent.
>
> Gerry R
>
>
> > Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
> >
> > I modeled the streamer out to ten feet.  The capacitance is probably a 
> > little too low at the beginning because of the way the model had to work 
> > with field shrouding:
> >
> > http://hot-streamer.com/temp/Leader-model.gif
> >
> > But this is what I came up with:
> >
> > http://hot-streamer.com/temp/Leader-model-1.gif
> >
> > The capacitance in pF is:
> >
> > C = 0.066666 x L        from 0 to 30 inchs
> >
> > C = 0.15 x L - 0.25     from 30 to ? inches
> >
> > One could write very complex equations, but this gets one close without a 
> > lot of calculation time.
> \>
> >         Terry