Brown University School of Engineering

Fluids Seminar: Skipping, Sloshing and Washboards

Add event to my Google calendar Add event to my Google calendar Share this event on facebook E-mail this event
Tuesday, April 23, 2013 3:00pm - 4:00pm

Neil Balmforth The University of British Columbia Vancouver, B.C Skipping, Sloshing and Washboards 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, NJB 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.