the first realization of an open-air siphon using soap films
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| (click on an image for a larger view) |
| In 2002, the high-school student Jonathan
Kamler started an experiment in my that tries to construct a tubeless
siphon with soap films. It didn't work: we couldn't get a siphon that
runs for more than a minute. In 2004, we still haven't given it up.
The siphon was finally realized by Julien Psaute (an undergraduate
student from France) when he worked as an intern during April-July,
2004. We now just succeeded in making a soap-film siphon that runs
for more than an hour (almost "forever"). Details on this project
will follow after the submission of a report on this experiment. |
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Figure 1: Schematic of the tubeless siphon using soap film. Some typical numbers are shown. |
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| Figure 2: Velocity profiles of a soap-film siphon at different heights. Measurements were made using Laser Doppler Velocimetry. |
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Figure 3: The "head" of the siphon, where
the soapy water is drawn from the top. Interference fringes
show thickness variation in the vertical direction. |
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