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  • Wave particle duality : unexpected equilibrium

    1,361 views 5 years ago
    I cannot stop playing with those droplets because when I start a session, I don't know what will come out !

    This time, I set up a circular corral, carefully tuned just below the faraday thresold. I estimated a relaxation time of 30 secs after perturbation. Which means, at my usual 30 Hz droplet vertical period, a memory parameter of around 900 !

    I started with a planar free surface and after several minutes I got a total ...... FREEZE !

    But then (not shown on the vid), I destroyed the droplet and let the surface relax more than 15 minutes ... waves were still here, a bit diminished. Which means, I was in fact above Faraday thresold at the beginning...yet there was no waves ???

    Transition to Faraday waves if mainly described as supercritical but sometimes I do wonder ... !

    NB : My device for generating waves is not pro, and not controlled, there might have been a shift in the forcing value in the middle...A bath of silicon oil is vibrated and oil droplets are deposited on the surface. Thanks to the vibrations, the droplets do not coalesce, but bounce on the surface.


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    For specific values of amplitude and frequencies, the droplet start to move forward by itself : while bouncing, it create waves with which it interacts.

    This object has been called a walker, or a dotwave, and exhibits properties reminiscent of an elementary particle, because it is at the same time a particle (the droplet) and a wave (The local standing wave pattern created by the droplet) Show less
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    • Wave mediated attraction - Duration: 42 seconds.

      • 5 years ago
      • 286 views
      Different (time) scales - different (perceptions of) motions Notice the radial oscillatory motion of the small droplet

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      A bath of silicon oil is vibrated and oil droplets are deposited on the...
    • 2 walking droplets gravitating - Duration: 2 minutes, 7 seconds.

      • 6 years ago
      • 3,576 views
      A bath of silicon oil is vibated and oil droplets are deposited on the surface. Thanks to the vibrations, the droplets do not coalesce, but bounce on the surface.

      For specific values of amplitude ...
    • Droplet generation with a toothpick - Shot with GoPro @ 240 fps - Slow down X64 - Duration: 71 seconds.

      • 5 years ago
      • 320 views
      A bath of silicon oil is vibrated and oil droplets are deposited on the surface. Thanks to the vibrations, the droplets do not coalesce, but bounce on the surface.

      For specific values of amplitude...
    • DotWaves interactions - Wave particle duality at the workshop - Duration: 99 seconds.

      • 5 years ago
      • 589 views
      2 or 3 dotwaves are filmed, interacting in different ways :
      - 2 dotwaves are gravitating on different orbits around a fixed one
      - 2 dowaves are getting closer, having a dance, then parting
      - 2 do...
    • Gopro 240 fps Bouncing and walking droplet - Duration: 65 seconds.

      • 5 years ago
      • 595 views
      This is how precise my temporal resolution can be with my modified goPro and (at last) a good lens : 240 fps ( @848×480 )

      Forcing freq is 60 Hz, so Faraday Freq is 30Hz, so for the usual walking mode
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