Exotic states of bouncing and walking droplets
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Bush_Exotic states.pdf
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1.56 MB
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Author(s)
Harris, Daniel Martin
Molacek, Jan
Bush, John W. M.
Wind-Willassen, Oistein
Date Issued
August 2013
Journal
Physics of Fluids
Publisher
American Institute of Physics (AIP)
Citation
Wind-Willassen, Oistein, Jan Molacek, Daniel M. Harris, and John W. M. Bush. “Exotic States of Bouncing and Walking Droplets.” Physics of Fluids 25, no. 8 (2013): 082002.
Version
Author's final manuscript
Abstract
We present the results of an integrated experimental and theoretical investigation of droplets bouncing on a vibrating fluid bath. A comprehensive series of experiments provides the most detailed characterisation to date of the system's dependence on fluid properties, droplet size, and vibrational forcing. A number of new bouncing and walking states are reported, including complex periodic and aperiodic motions. Particular attention is given to the first characterisation of the different gaits arising within the walking regime. In addition to complex periodic walkers and limping droplets, we highlight a previously unreported mixed state, in which the droplet switches periodically between two distinct walking modes. Our experiments are complemented by a theoretical study based on our previous developments [J. Molacek and J. W. M. Bush, J. Fluid Mech.727, 582–611 (Year: 2013);10.1017/jfm.2013.279J. Molacek and J. W. M. Bush, J. Fluid Mech.727, 612–647 (Year: 2013)]10.1017/jfm.2013.280, which provide a basis for rationalising all observed bouncing and walking states.
MIT Department
Massachusetts Institute of Technology. Department of Mathematics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.4817612
