Skip to main content

Frozen Powder Drops

The Division of Fluid Dynamics annual meeting has officially begun in San Diego, CA, ending tomorrow. So how should we celebrate? With awesome fluid dynamics videos, of course.

Every year, this physics meeting hosts a gallery of fluid motion, highlighting the beautiful physics behind this field. A panel of judges ultimately selects the best videos and posters based on "artistic value, scientific content, and originality."

Today, we have another great entry for you that was originally posted on the arXiv. In the video, physicists from King Abdullah University of Science and Technology in Saudi Arabia were able to "freeze" water droplets after they impact a layer of super hydrophobic (water-avoiding) powder.

If the droplets hit the surface fast enough, the powder will lock them into some beautiful shapes that resemble bowling pins and ice cream cones. Right after impact, the water droplets seem to instantly transform into something resembling a Sour Patch Kid. Check it out!

The hydrophobic powder used in the video forms a structure around the outside of the water droplet and encloses it. Wrapping around the droplet, the powder locks the water into a number of shapes.

All of the videos from the gallery should be available early next year.


Popular Posts

How 4,000 Physicists Gave a Vegas Casino its Worst Week Ever

What happens when several thousand distinguished physicists, researchers, and students descend on the nation’s gambling capital for a conference? The answer is "a bad week for the casino"—but you'd never guess why.

Ask a Physicist: Phone Flash Sharpie Shock!

Lexie and Xavier, from Orlando, FL want to know: "What's going on in this video ? Our science teacher claims that the pain comes from a small electrical shock, but we believe that this is due to the absorption of light. Please help us resolve this dispute!"

The Science of Ice Cream: Part One

Even though it's been a warm couple of months already, it's officially summer. A delicious, science-filled way to beat the heat? Making homemade ice cream. (We've since updated this article to include the science behind vegan ice cream. To learn more about ice cream science, check out The Science of Ice Cream, Redux ) Image Credit: St0rmz via Flickr Over at Physics@Home there's an easy recipe for homemade ice cream. But what kind of milk should you use to make ice cream? And do you really need to chill the ice cream base before making it? Why do ice cream recipes always call for salt on ice?