title: From antinode clusters to node clusters: the concentration-dependent transition of floaters on a standing Faraday wave.
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 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.
authors.affiliation: Physics of Fluids Group, MESA+ Institute for Nanotechnology, J. M. Burgers Centre for Fluid Dynamics, University of Twente, P. O. Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Ceyda
authors.initials: C
authors.lastname: Sanlı
authors.affiliation: Physics of Fluids Group, MESA+ Institute for Nanotechnology, J. M. Burgers Centre for Fluid Dynamics, University of Twente, P. O. Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Detlef
authors.initials: D
authors.lastname: Lohse
authors.affiliation: Physics of Fluids Group, MESA+ Institute for Nanotechnology, J. M. Burgers Centre for Fluid Dynamics, University of Twente, P. O. Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Devaraj
authors.initials: D
authors.lastname: van der Meer
mesh_terms: D003198:Computer Simulation; D008956:Models, Chemical; D008958:Models, Molecular; D054118:Nanospheres / Q000737:chemistry* / Q000648:ultrastructure; D009991:Oscillometry / Q000379:methods*; D044367:Phase Transition; D012212:Rheology / Q000379:methods*; D012996:Solutions / Q000737:chemistry*; D014732:Vibration
chemical_list: D012996:Solutions