70th Annual Meeting of the APS Division of Fluid Dynamics (November 19, 2017 — November 21, 2017)

P0035: Universal nanodroplet branches from confining the Ouzo effect

Authors
  • Martin H. Klein Schaarsberg, Physics of Fluids Group, Max Planck Center Twente, J. M. Burgers Centre for Fluid Dynamics, University of Twente, 7500 AE Enschede, The Netherlands
  • Ziyang Lu, School of Engineering, Royal Melbourne Institute of Technology University, Melbourne, VIC 3001, Australia
  • Xiaojue Zhu, Physics of Fluids Group, Max Planck Center Twente, J. M. Burgers Centre for Fluid Dynamics, University of Twente, 7500 AE Enschede, The Netherlands
  • Leslie Y. Yeo, School of Engineering, Royal Melbourne Institute of Technology University, Melbourne, VIC 3001, Australia
  • Detlef Lohse, Physics of Fluids Group, Max Planck Center Twente, J. M. Burgers Centre for Fluid Dynamics, University of Twente, 7500 AE Enschede, The Netherlands; Max Planck Institute for Dynamics and Self-Organization, 37077 Goettingen, Germany
  • Xuehua Zhang, School of Engineering, Royal Melbourne Institute of Technology University, Melbourne, VIC 3001, Australia; Physics of Fluids Group, Max Planck Center Twente, J. M. Burgers Centre for Fluid Dynamics, University of Twente, 7500 AE Enschede, The Netherlands

Pour some water into your glass of ouzo, and the beverage will change from
transparent to milky. We demonstrate that the oil nanodroplets self-organize in universal branching patterns when the ʻOuzo effectʼ is confined to a quasi-2D geometry. The formation of these nanodroplet branching patterns is governed by the interplay between the local concentration gradient, diffusion, and collective interactions. Pictured is a visualization of the autonomous motion of colloidal particles driven by local concentration gradients around the droplet branch structure.

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