Re: Tesla simulation software project

["Calvin Patrick" <linhack_tux-at-yahoo-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Ok, here is your "computer minded" coiler's opinion. 
the complexity of this program is great.  you would
need lots of experienced programers to acomplish this
task.  if we could make a webpage with our goals in
mind, a little(?) file on what the program should do,
and what platforms we would like it written for, then
put a post on slashdot-dot-org about the project, we could
get exposure to lot's of programsers (mostly linux
fanatics like myself).  What i would forsee is a
prgoram that collects your data, then runs the
variables through the given set of equasions, and
makes a simularor file after, sort of like compiling a
programthen you can watch the whole simulation in a
few hours after input of the data (hey, for that much
presion, you must pay in processing cycles).  and, in
the case of a linux program, you could use the old
trick of running it in the background.  I would be
willing to set up such a page if people would be
willing to contribute.  feel free to email me if
anyone want to help out.  linhack_tux-at-yahoo-dot-com

Calvin
--- Tesla List <tesla-at-pupman-dot-com> wrote:
> Original Poster: "boris petkovic"
> <petkovic7-at-yahoo-dot-com> 
> 
> 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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