Interaction of two flapping filaments in a flowing soap film

Luoding Zhu, Charles S. Peskin

Research output: Contribution to journalArticlepeer-review


Using the immersed boundary method, we have simulated the motion of two flexible filaments in a flowing soap film, which was experimentally studied by Zhang et al. [Nature (London) 408, 835 (2000)]. We found numerically two distinct modes of sustained oscillation of the two filaments: parallel flapping and mirror-image clapping, depending on the separation distance between the two filaments. Our simulation results agree with that of the experiment at least qualitatively, even though the Reynolds number of the flowing soap film in our simulation is about two orders of magnitude lower than that of the experiment.

Original languageEnglish (US)
Pages (from-to)1954-1960
Number of pages7
JournalPhysics of Fluids
Issue number7
StatePublished - Jul 2003

ASJC Scopus subject areas

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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