h a l f b a k e r yRecalculations place it at 0.4999.
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Have you ever watched champagne bubbles in a
champagne flute? Bubbles form in only a few
locations in
the glass. These are the parts of the glass that are not
smooth where scratches or protrusions act as
nucleation
sites. Champagne flutes will often have these
nucleation
sites added deliberately
so the champagne can bubble
in
an elegant manner.
I thought it would be interesting if the nucleation sites
could be actively controlled (turned on and off) so the
bubbles form an image briefly as they rise before the
bubbles pop
at
the surface.
The nucleation sites could be formed by several
alternative methods. Here's two possibilities:
•The points of glass could be selectively heated by a
scanning laser.
•An array of piezoelectric elements could focus sound
waves at different points of the glass.
The nucleation sites could be in a line, thus forming a
two
dimensional images with a wall of bubbles.
Alternatively
the nucleation sites could be in a plane, thus forming a
3D
image with bubbles.
The_20Bird_20Men_20of_20Alka-Selzer
Entertainment by bubbles [xenzag, Jul 20 2019]
Prior hb art
Nucleadverts
[2 fries shy of a happy meal, Jul 20 2019]
Fun with waves
Antichirp-wave_20fleet-sinker
As mentioned... [neutrinos_shadow, Jul 21 2019]
[link]
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Like one of those "messaging" water features ? |
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"If you build it with Gin and Tonic, they will come ..." |
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Don't invite any of the Buchanan family to the product launch. |
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Oi! Some twat's put tonic in my G&T! |
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"Why bother with mass spectrometry when you can just get [MB] to sniff it ...? " |
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Rickards Red beer used to have their logo etched into the bottom of their mugs so that it made a stylized R on the foam. (+) |
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Is the tech needed for the Tokamak, to make our little box equivalent to that of Sol's processes? |
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Hmm... if you have a few piezo's in an open grid (spacing
and therefore quantity depends on the vibration disipation)
you could do a "phased array" input of *not quite enough*
energy to initiate bubble nucleation (at each piezo) but
where the multiple vibration waves converge (as per the
"Anti-chirp" linked) there IS enough energy and a bubble
rises. So you can create a bubble anywhere with minimal
piezo units (and if your software is smart enough, multiple
anywheres at the same time or quickly sequential or
whatever). |
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