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Multimodal Sensing Solves the Water-Drop “Plink” Mystery
12/20/2018

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Figure 2
The research setup used a fish tank with ultrahigh-speed video cameras focused above and below surface, a hydrophone, a microphone, and a controlled 'drip' mechanism. (Image source: Physics Today/AIP Publishing LLC)

The research setup used a fish tank with ultrahigh-speed video cameras focused above and below surface, a hydrophone, a microphone, and a controlled “drip” mechanism. (Image source: Physics Today/AIP Publishing LLC)

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DavidHamilton
DavidHamilton
1/16/2019 1:45:33 AM
User Rank
Newbie
Re: High Speed Video Recording
And this guys, is why science is so important. Haha! I'm just kidding. Honestly, I love the way that you've been able to explore and examine this, just because we can! Now to take the experiment one step further and see if we're able to recreate the "plink" in different volumes and magnitude. That would be something I would honestly want to see being tested!

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Rama Murthy
Rama Murthy
1/7/2019 5:07:48 AM
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Newbie
High Speed Video Recording
Nice summary. Sphagetti string breaking study is also as interesting.Some interesting insights in the sequence of events could be observed by recording in microsecond intervals as has been reported by MIT recently. That simple dropping (not even explosive bubble) water and Fracture mechanics events need microseconds resolution is a bit surprising.An expert at Philips said a few decades ago that as technology develops exponentially, applications devour them logarithmically. I wonder if such high speed cameras are available at sub $500 cost?

        As for the trivial question to be investigated, how about the same water droplet falling on a hot(100+ DEG C) dry plate? The sound of evaporating water is a plink with a bang.Is that because of the wave front being steeper or travelling faster (due to rapid evaporation) or both or something else? 

 Also how about evaluating the transient response of a tweeter usng high speed camera? Probably we can explain the phenomena of settling time in control systems better if we introduce this in engineering curriculum? Many physics and engineering experiments can be redone using this.

 

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