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 ϕ , 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 (i) that at low ϕ antinode clusters are energetically favorable over nodal ones and (ii) how this situation reverses at high ϕ , in agreement with the experiment.
|Number of pages||9|
|Journal||Physical review E: Statistical, nonlinear, and soft matter physics|
|Publication status||Published - 2014|
Sanli, C., Lohse, D., & van der Meer, D. (2014). From antinode clusters to node clusters: The concentration dependent transition, of floaters on a standing Faraday wave. Physical review E: Statistical, nonlinear, and soft matter physics, 89(053011), . https://doi.org/10.1103/PhysRevE.89.053011