Skipping Stones, Ruined Roads and those Dam Oscillations
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If you have a question about this talk, please contact Catherine Pearson.
In this talk I will describe recent results
on the modelling of how the collision of an object with a
moving, deformable surface can generate an apparent
``super-elastic’’ bounce. The phenomenon allows towed
paddles to skip continually at high speed over water
(demanding an extension of models of skipping stones) and
to ``washboard’’ layers of sand or mud with only a single
passage over that substrate (in contrast to the
conventional explanation for washboard roads). Along the
way, I will mention a related instability involving the
sloshing of a fluid reservoir coupled to oscillations of
a movable dam, a hydrodynamic analogue of musical
instruments like the clarinet.
This talk is part of the Seminars for the Institute for Energy and Environmental Flows (formerly BP Institute) series.
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