From antinode clusters to node clusters: The concentration dependent transition of floaters on a standing Faraday wave

ORAL

Abstract

A hydrophilic floating sphere that is denser than water drifts to an amplitude maximum (antinode) of a surface standing wave. A few identical floaters therefore organize into antinode clusters. However, beyond a transitional value of the floater concentration $\phi $, we observe that the same spheres spontaneously accumulate at the nodal lines, completely inverting the self-organized particle pattern on the wave. From a potential energy estimate we show that at low $\phi $ antinode clusters are energetically favorable over nodal ones and how this situation reverses at high $\phi $, in agreement with experiment.

*The work is part of the research program of FOM, which is financially supported by NWO; C.S. acknowledges financial support.

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Authors

  • Ceyda Sanli

    • Okinawa Institute of Science and Technology

  • Detlef Lohse

    • University of Twente
    • Physics of Fluids, University of Twente, Enschede
    • Physics of Fluids, University of Twente
    • Physics of Fluids group, University of Twente, Netherlands
    • Universiteit Twente
    • University of Twente, Physics of Fluids Group
    • University of Twente, Enschede, The Netherlands
    • Physics of Fluids Group, Faculty of Science and Technology, J.M. Burgers Center for Fluid Dynamics, and IMPACT Institute, University of Twente, NL
    • Physics of Fluids Group, University of Twente, The Netherlands

  • Devaraj van der Meer

    • Physics of Fluids, University of Twente