Promenading pairs of walking droplets: Dynamics and stability

Juncal Arbelaiz, Anand U. Oza, John W.M. Bush

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

We present the results of an integrated experimental and theoretical investigation of the promenade mode, a bound state formed by a pair of droplets walking side by side on the surface of a vibrating fluid bath. Particular attention is given to characterizing the dependence of the promenading behavior on the vibrational forcing for drops of a given size. We also enumerate the different instabilities that may arise, including transitions to smaller promenade modes or orbiting pairs. Our theoretical developments highlight the importance of the vertical bouncing dynamics on the stability characteristics. Specifically, quantitative comparison between experiment and theory prompts further refinement of the stroboscopic model [A. U. Oza, J. Fluid Mech. 737, 552 (2013)JFLSA70022-112010.1017/jfm.2013.581] through inclusion of phase adaptation and reveals the critical role that impact phase variations play in the stability of the promenading pairs.

Original languageEnglish (US)
Article number013604
JournalPhysical Review Fluids
Volume3
Issue number1
DOIs
StatePublished - Jan 2018

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes
  • Computational Mechanics
  • Modeling and Simulation

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