Water Droplet On Superhydrophobic Surface Image 2
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Water Droplet On Superhydrophobic Surface (Image 2)

July 11, 2011
A series of color-enhanced images showing a droplet of water being deposited on a superhydrophobic (water-repelling) surface.

A water hammer can occur when a valve is suddenly opened or closed in a pipe carrying water or steam, causing a pressure wave to travel down the pipe with enough force that it can sometimes cause the pipes to burst. Now, research by MIT's Kripa Varanasi, the d'Arbeloff Assistant Professor of Mechanical Engineering, shows that a similar effect takes place on a tiny scale whenever a droplet of water strikes a surface.

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