Monday, November 19, 2012

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.

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