Scientists discover how droplets levitate on liquid surface

Scientists discover how droplets levitate on liquid surface

MIT Scientists discover how droplets can levitate on a liquid surface. Have you ever seen droplets skitter across a puddle on a rainy day, or when you pour milk into your coffee? Researchers have just found an explanation for why that happens under some conditions.

According to MIT scientists, to have a droplet float on the surface before combining with the rest of the liquid, temperature differences is the key. And their latest research even shows how we can control this process.

Most of the time, liquid poured or dropped onto the same liquid will combine immediately, but sometimes you get droplets levitating on top. This counterintuitive phenomenon is called ‘noncoalescence’ – and it actually has a lot of uses in science.

Cold cream drops “levitate” on hot coffee.

In a study published in the Journal of Fluid Mechanics, scientists from the Massachusetts Institute of Technology explain that whether or not a droplet resists another liquid surface or doesn’t all comes down to whether they have a difference in temperature.

Take a look at the video how ‘levitation of droplet takes place on liquid surface

In this video showing a temperature difference between a droplet and a bath can help levitate droplets without any direct contact.

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