Re: Tesla simulation software project

["boris petkovic" <petkovic7-at-yahoo-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi Paul,
I absoulutely agree with you.There is utter time for A
Complete and Extensive   computer analysis of
secondary coil electrodynamics.The Program in question
should be able to simoulteneosly solve large set of
diff. eqs. arising from 1000s of elements of secondary
network scheme (In first place,I'm refering to overall
inductive and capacitive  coupling of  every each turn
towards others and turns to ground capacities  ).
Graphical presentation of secondary response to Any
given excitation waveform for each point (turn) of
winding in time and space should be also an output
result of concerned simulation package.
There are few Ph.D members on Tesla list,but to my
knowledge you're the first person who stresses a need
for powerful computer software which will put a stop
to many speculations and  ponderings about secondary 
behavior.
I'm not a computer programer and I don't know if
"brutte force" Microsim like programm dealing with
1000s of elements may operate in human acceptable time
(some computer minded member of the list should have
answer this?)  ,but extensive computer simulation of
coil electrodynamics idea is definitely worth of try.

Regards,
Boris  


 > In view of the current interest in estimating
> resonant frequencies,
> members of the list may be interested in an ongoing
> software project
> concerned with modeling of tesla resonators.
> 
> There are two programs involved,
> 
> 1/ tlap.c
> 
> This program computes the various external
> capacitances of the
> tesla resonator by computing the E field in a
> spacial resolution of
> 1mm out to a radius of 3m from the coil, and to
> progressively lower
> resolution out to a distance of 24m using multigrid
> methods and
> a varying cell size across the field. Techniques are
> employed which
> simulate boundaries at infinity (ie the sky) where
> required.
> A continuous graphic display is maintained by the
> program which shows
> the field as it evolves during the computation.
> The toploading capacitance and coil capacitance
> profile
> are computed and used as input to the second
> program.
> 
> 2/ tsim.c
> 
> This program models the operation of the tesla
> resonator using
> a cascade of several hundred discrete transmission
> line sections
> leading to a large set of simultaneous equations for
> V and I
> which are then solved by Gaussian elimination.
> The transmission line model employed takes into
> account the capacitance
> profile, mutual inductance, end-effects, and
> inter-turn capacitance.
> The program outputs the base input impedance as a
> function of frequency,
> together with the V/I profile of the coil.
> 
> The aim of these two programs is to be able to
> compute the resonant
> frequencies and input impedance to better than 5
> percent starting
> from the gross physical characteristics of the
> resonator. While there
> are other programs better suited to assisting with
> practical coil
> design issues, the intention here is to clarify
> understanding of
> the resonant mechanism, thus the programs are
> written for clarity
> and precision rather than efficiency.
> 
> It would be nice to see this software released to
> the public domain, but
> some further work would be needed first. For
> example, tlap.c requires
> some
> attention to the method of simulating boundaries at
> infinity, and tsim.c
> suffers from the lack of a model of ground plane
> I^2R losses. These and
> other defects mean that the above aim has not yet
> been achieved.
> 
> This software would benefit from peer review, and
> requires validation
> against a range of actual coils.  Therefore I would
> be pleased to hear
> from anyone who would like to contribute to a
> collaborative effort to
> finish, validate, and package these two programs.
> 
> The software is compiled under gcc and runs on unix
> workstations.
> tlap.c expects an X11 display terminal.
> Documentation is latex/dvi/postscript.
> 
> Regards,
> --
> Paul Nicholson,
> Manchester, UK.
> paul-at-abelian.demon.co.uk
> --
> 



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