[SI-LIST] Re: Honey, your conductors are ready!
- From: "Kevin G. Rhoads" <krhoads@xxxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Sun, 16 Nov 2014 13:05:08 -0500
On 11/16/2014 4:47 AM, Loyer, Jeff wrote:
> What I still don't understand is why some metals spark, and some don't (it
> seems that shape plays as much a part as anything, besides having it touch
> the walls).
Considering the power, the E-fields are non-trivial and edge
concentration effects are relevant. Proximity to (grounded) metal walls
allows spark-overs. And field-driven arcs are possible, even likely.
http://www.scribd.com/doc/84859094/Continuum-Electromechanics-cem-811
(Creative commons licensing from MIT OCW)
I think we can find somethings of relevance in this textbook as well as
the venerable:
http://www.scribd.com/doc/100077023/Electric-Arc-Phenomena
At the thickness of normal aluminum foil and the likely levels of
induced current -- the foil is probably a resistance heater.
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