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Free wheeling water droplets plot their own path off a hot plate

5 monthes ago   |   By Ars Technica

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Here are the two best things about fluid dynamics: scaling laws and cool videos. A group of researchers has been studying the behavior of water on a hot plate. You are probably all familiar with the effect: you drop some water on a hot plate, the water hisses a bit, and the drop races crazily over the surface. This is called the Leidenfrost effect.
(Its name has nothing to do with frost; rather, the person who first described it was named Johann Gottlob Leidenfrost.)
The drop's motion was assumed to come predominantly from the shape of the hot plate's surface. The plate is almost...
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