Stig Östlund

lördag, juni 04, 2011

Water Droplet On Superhydrophobic Surface (Image 2)


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.

The research was funded in part by a grant from the National Science Foundation (CBET 09-52564). To learn more, see the MIT news story "Research update: How to tame hammering droplets." >> http://web.mit.edu/newsoffice/2011/droplets-0121.html

Credit: Kripa K. Varanasi, Massachusetts Institute of Technology

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