Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Self-propelled water

  1. Apr 6, 2006 #1

    Mk

    User Avatar

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

    NY times graphic.
    http://graphics8.nytimes.com/images/2006/03/20/science/sciill900.jpg
     
  2. jcsd
  3. Apr 7, 2006 #2

    Clausius2

    User Avatar
    Science Advisor
    Gold Member

    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

    Astronuc

    User Avatar

    Staff: Mentor

    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.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Self-propelled water
  1. Self-propelled Car (Replies: 12)

Loading...