77th Annual Meeting of the APS Division of Fluid Dynamics (November 24, 2024 — November 26, 2024)

P2691079: Dynamic Superlattices

Authors
  • Debashis Panda, Imperial College London
  • Lyes Kahouadji Dr, Imperial College London
  • Laurette S. Tuckerman, Physique et Mecanique des Milieux Heterogenes (PMMH)
  • Seungwon Shin, Hongik University
  • Jalel Chergui, CNRS
  • Damir Juric, Université Paris Saclay, Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire des Sciences du Numérique (LISN), 91400 Orsay, France
  • Omar K. Matar, Imperial College London
DOI: https://doi.org/10.1103/APS.DFD.2024.GFM.P2691079

Two-frequency parametric oscillation of silicone film excites waves of two wavenumbers, that combine into exotic superlattices. Here, we describe a transient superlattice pattern transition from initially stable hexagonal waves. The hexagons break to form DNA-like structures, which transform to rhomboidal structures. Afterwards, a transient two-hexagon state forms that eventually breaks to again form a DNA pattern with a longer wavelength. We invite the viewers to observe these exotic patterns and appreciate the rich physics of mode interactions in Faraday waves.

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