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re: Re: Etesla6 math questions
- To: tesla@pupman.com
- Subject: re: Re: Etesla6 math questions
- From: "Tesla list" <tesla@pupman.com>
- Date: Fri, 31 Jan 2003 20:22:25 -0700
- In-Reply-To: <200302010244.h112iAt01010@nintendo.Eng.Sun.COM>
- Resent-Date: Fri, 31 Jan 2003 20:22:32 -0700
- Resent-From: tesla@pupman.com
- Resent-Message-ID: <ebtyRD.A.coH.x1zO-@poodle>
- Resent-Sender: tesla-request@pupman.com
Original poster: "Terry Fritz" <teslalist@qwest.net>
Hi Peter,
A goggle search for "e-field calculation equipotential" brings up many fine
sources like:
http://www.electrostatics3d.com/Main/Home.htm
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/gaulaw.html
http://www.fieldp.com/book.html
http://www.electrostatic.com/Humphries.htm
but these are all too "high brow".... the "real" method is trivial... I
don't seem to find a "straight forward" on-line explanation for how one
finds the E-fields in a 2D space with boundary conditions....
I am hoping one of our more learned people out there has that perfect
explanation? All it does, is the computer averages the four points around
a given point many many times... Seems so simple but I can't explain it
with words... Let me think on the explanation and hope someone else has
the answer in the mean time ;-))
I hate to be the blind one leading the blind here 8-))
Cheers,
Terry
At 06:44 PM 1/31/2003 -0800, you wrote:
>Terry,
> here is the part I did not understand the first time around and still
>don't understand:
>
>
> > The charge density certainly is non-uniform. But that is controlled by
> the
> > shape and E-Tesla does the "E-field relaxation thing" to find the E-field
> > (voltages) around the coil.
> >
> > When we do the relaxation matrix, the charge density on the parts works
> > out!! Sharp edges get high fields do to high densities. Smooth edges get
> > low fields do to low densities. The "relaxation" does this field density
> > adjustment for us.
>
>
>where can I read about the "relaxation thing", this seems to be the crux of
>the matter. It seems to be a well known numerical analysis of fields
>technique, but I've never taken more that an introductory numerical analysis
>class and have not heard of this, and it might be a bit more involved than
>you could describe in email...
>
>
>thanks,
>Pete Lawrence.