Re: Longitudinal Forces in Tesla Coil Metallic Conductors

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Bert,

I got a batch of your shrunken quarters years ago and I requested to 
get the "wire fragments too" ;-)))

"Normal" people get a kick out of the coins, but "I" got the wires 
too since that is what is "really cool" :o))

I still have them all (I guess I kept them all for "myself" :-)))

I scanned some wire here (big 4 Meg file):

http://hot-streamer.com/temp/ExpWire.jpg

The wire was stretched as an X-Y vector as an "expanding coil" 
probably not too much larger than the coin.  There are inertial and 
explosive forces that tend to bend the wire up too along with impacts 
to the containment walls...  The wire fails in weak areas that become 
dominate fracture areas.  I suspect plasmas became conductors as the 
system ripped apart too.

So the big question is...  Is there anyway to determine if there are 
"pure" Z-axis forces?  Perhaps the wire could be bent in some special 
way to show only pure Z-axis stress...

I fear, like displacement currents and such, that there is no way to 
separate or "see" the pure Z-axis forces...

Cheers,

        Terry




At 10:40 PM 4/24/2006, you wrote:
> Terry and all,
>
> Just a quick note - if you Google "Ampere Force" you'll find LOTS more
> hits, quite a few of them in the published literature.
>
> Those on the list who also play with very high currents such as coin
> shrinking or (especially) exploding wires may encounter some rather
> "interesting" effects associated with wire fragmentation. Under very
> fast, high current pulses, wires shatter into relatively equal sized
> fragments, with fracture surfaces showing clear evidence of tensile
> forces. This phenomenon does not appear (at least a first glance) to be
> consistent with Maxwell/Lorentz forces.
>
> For some very interesting reading, try the following books by Peter and
> Neal Graneau:
> "Ampere-Nuemann Electrodynamics of Metals"
> "Newtonian Electrodynamics"
> "Newton Versus Einstein"
>
> Another fairly good link is a Masters Thesis on Longitudinal
> electrodynamic forces:
> http://www.df.lth.se/~snorkelf/Longitudinal/Slutdok.html
>
> Best regards,
>
> Bert
>
> Tesla list wrote:
>
> > Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>
> > Hi,
> > The base reference seems to be here:
> > http://fusor.net/board/view.php?site=fusor&bn=fusor_other&key=1128021481
> >
> > If we search on the keys Richard mentions:
> > http://www.google.com/search?hl=en&q=%22Amperian+electrodynamics%22
> > http://www.google.com/search?hl=en&lr=&q=%22Ampere-Weber+electrodynamics%22
> >
> > There are no definitive references.  The links circle back to
> > fusor.net.
> > According to Richard:
> > "Check it out all you physics buffs. Non-induction, low current apps
> >  based EE's need not look as Maxwell still provides all the answers
> > you will ever need."
> > "If" there is some quaint effect there, it seems to be practically no
> >  information on the net about it.  It does not seem to be a concern
> > to us in any case, so we will leave it up to fusor.net.
> > I will kill the thread...
> > Cheers,
> > Terry
> >
> > At 08:56 PM 4/24/2006, you wrote:
> >
> > > Terry n friends...this might be the links you were looking for:
> > > <http://www.google.com/search?hl=en&q=amperian+forces>http://www.google.com/search?hl=en&q=amperian+forces
> > >
> > > Cheers, Mike