Collective motion of macroscopic spheres floating on capillary ripples: Dynamic heterogeneity and dynamic criticality

Ceyda Sanli, Kuniyasu Saitoh, Stefan Luding, Devaraj van der Meer

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)
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Abstract

When a densely packed monolayer of macroscopic spheres floats on chaotic capillary Faraday waves, a coexistence of large scale convective motion and caging dynamics typical for glassy systems is observed. We subtract the convective mean flow using a coarse graining (homogenization) method and reveal subdiffusion for the caging time scales followed by a diffusive regime at later times. We apply the methods developed to study dynamic heterogeneity and show that the typical time and length scales of the fluctuations due to rearrangements of observed particle groups significantly increase when the system approaches its largest experimentally accessible packing concentration. To connect the system to the dynamic criticality literature, we fit power laws to our results. The resultant critical exponents are consistent with those found in densely packed suspensions of colloids.
Original languageEnglish
Article number033018
Pages (from-to)-
Number of pages6
JournalPhysical review E: Statistical, nonlinear, and soft matter physics
Volume90
Issue number033018
DOIs
Publication statusPublished - 30 Sep 2014

Keywords

  • IR-93732
  • METIS-308201

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