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liushanshan

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The cup was machined out of a solid aluminum rod. The
inner cylindrical side of the cup constitutes the racing track
for the droplets. This racing track has a small concave cur-
vature with a radius of 50 cm, to hold the droplets on track.
We used a cup with 30 mm inner radius and 15 mm width.

ÁíÒ»¶ÎÊÇFigure 3 shows a photo of a stable 3 mm water droplet
on the inner racing track of the cup, rotating at 200 rpm.
Despite looking quiet, the outer shell of the droplet in this
situation is rotating around its center of mass at 4000 rpm¡£
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liushanshan(½ð±Ò+4):ºÜºÃ 2010-09-19 17:07:47
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liushanshan

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