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Title: Wicking

Description: A simple demonstration that the height of the water is essentially independent of the contact area at the base. The distance up the paper grows like the square root of time (ie it is fast initially and then slows down). This is called the Washburn equation. You can also see that "edges" of the paper are special - the liquid climbs higher faster here - there is an edge effect that leads to higher upwards capillary force...

Credits: Gareth McKinley, Chris Rogers,Erich Tisch, NSF


Web Page:

Contributed By: Erich Tisch

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