Nano drops explode 19th century theory

February 12, 2019, University of Warwick

Droplets emanating from a molecular "nano-tap" would behave very differently from those from a household tap 1 million times larger—researchers at the University of Warwick have found. This is potentially crucial step for a number of emerging nano technologies, e.g., manufacture of nano-sized drug particles, lab-on-chip devices for in situ diagnostics, and 3-D printers capable of nanoscale resolution.

Molecular simulations of liquid jets, akin to a stream of water pouring out of a nano-tap, have been used by researchers at the University of Warwick to probe the nanoscale production of droplets. The reduction in scale from the household jet is equivalent to that of Big Ben being shrunk to the size of a human hair!

The breakup of jets has a , devised by Rayleigh and Plateau in the 19th century, but this was found to be inadequate at the nanoscale, where one cannot ignore the inherent jostling of molecules that produces nano-waves on the liquid's boundary. The new theory developed captures these nano-waves and can accurately predict the production of nanodroplets.

This theory predicts that droplets are easier to produce at the nanoscale than from the household tap, with nano-waves acting to breakup jets that would be classically stable.

Prof. Duncan Lockerby from the School of Engineering at the University of Warwick comments:

"Our research is concerned with developing new understanding for emerging nanoscale technologies, using simulation for design techniques, and this research exemplifies this effort with potential applications in manufacturing and healthcare."

Credit: University of Warwick

Dr. James Sprittles from the Mathematics Institute at the University of Warwick comments:

"It has been wonderful to work on a problem whose classical solution I teach to 3rd year undergraduates and to develop a new updated for application at the "

The paper 'Revisiting the Rayleigh-Plateau Instability for the Nanoscale' has been published Open Access as a Rapid Communication in the prestigious Journal of Fluid Mechanics. It has also featured on the Front Cover of Volume 861 and is currently 4th Most Read Article.

Explore further: New model describing the deformation and breakup of droplets could help improve nanoscale printing and spraying

More information: Chengxi Zhao et al, Revisiting the Rayleigh–Plateau instability for the nanoscale, Journal of Fluid Mechanics (2019). DOI: 10.1017/jfm.2018.950

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6 comments

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Surveillance_Egg_Unit
3 / 5 (2) Feb 12, 2019
It appears that there is something wrong with the video since nothing is moving.
Da Schneib
1 / 5 (1) Feb 13, 2019
Snicker. Sorry, sport, science isn't Star Wars. It's not about pretty pictures. You have to understand math and be able to spot patterns, which is far beyond your IQ of about 80, which is apparently enough to get you a degree from an online so-called "Business 'College'" and get you busted for trying to fiddle the accounts to steal some money.

Cheaters never prosper.
Tilly55
1 / 5 (1) Feb 13, 2019
Have you considered that each water molecule that's available from a regular tap is polarized by nature. But because each water molecule did not synchronize with the group (they have a chaotic orientation in relation to each other) in the water we consume, the overall water polarity is neutral. It's like you have a full bag of Duracell batteries, but can't use its electrical power.

In water from the molecular nano-tap the picture is completely different. This water structure becomes polymer-like, and water molecules become like links in DNA chains - oriented one to another in a certain order. Think of a series of Duracell batteries in a flash light with + to - in which case they amplify each other's voltage. When water becomes polarized in a certain way each water molecule amplifies the next one, and so on.... This water also has a certain frequency of vibration, which affects our body in positive way.

I haven't seen any comparable analysis to nano-tap water. :)
Surveillance_Egg_Unit
3 / 5 (2) Feb 13, 2019
The video is still motionless and the minutes/seconds counter hasn't moved past 00:00 - although the indicator is showing that it is still loading - for the past 35 minutes. It's all Da Shniebo's fault.
Da Schneib
1 / 5 (1) Feb 13, 2019
And now we get the "polarized water" nutjobs.

Neato.

Meanwhile, @SEU is incompetent to operate a browser. Why is this incompetent individual posting on a physics site? Looks like standard trolling to me. Say something stupid; lie about what others respond with; when presented with refutation, lie about what you said; lie some more; declare victory and claim "I knew it all along."

Typical troll profile.
Da Schneib
1 / 5 (1) Feb 13, 2019
The stupids are ruining the Internet. It's now the "net of a million lies."

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