Bouncing droplet dynamics above the Faraday threshold
Author(s)
Tambasco, Lucas; Pilgram, J. J.; Bush, John W. M.
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We present the results of an experimental investigation of the dynamics of droplets bouncing on a vibrating fluid bath for forcing accelerations above the Faraday threshold. Two distinct fluid viscosity and vibrational frequency combinations (20 cS-80 Hz and 50 cS-50 Hz) are considered, and the dependence of the system behavior on drop size and vibrational acceleration is characterized. A number of new dynamical regimes are reported, including meandering, zig-zagging, erratic bouncing, coalescing, and trapped regimes. Particular attention is given to the regime in which droplets change direction erratically and exhibit a dynamics akin to Brownian motion. We demonstrate that the effective diffusivity increases with vibrational acceleration and decreases with drop size, as suggested by simple scaling arguments.
Date issued
2018-09Department
Massachusetts Institute of Technology. Department of MathematicsJournal
Chaos
Publisher
AIP Publishing
Citation
Tambasco, L. D. et al. "Bouncing droplet dynamics above the Faraday threshold." Chaos 28 (March 2018): 096107 © 2018 Author(s)
Version: Final published version
ISSN
1054-1500
1089-7682