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Self-propelled water

  1. Apr 6, 2006 #1


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    http://www.uoregon.edu/~linke/dropletmovies/ [Broken]
    The University of Oregon seems to be having fun using the Leidenfrost effect to propel droplets uphill, downhill, and all aroundhill.

    NY times graphic.
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Apr 7, 2006 #2


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    Seems interesting. I don't understand very well the mechanism of how the droplet moves over the surface. It seems to me it's something to do with Hydrodynamic Lubrication effects (Re<<1) of lift and drag on the droplet. But I'm not sure.
  4. Apr 8, 2006 #3


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    Heat is thermal energy and that involves molecular motion. The motion has to do with wave propagation (momentum transfer) and phase of the waves with respect to the mass being moved.

    I have seen something similar with fiber surfaces (like carpet) used to move objects forward or backward, based on frequency and amplitude.
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