Fast inertial particle manipulation in oscillating flows

Raqeeb Thameem, Bhargav Rallabandi, Sascha Hilgenfeldt

Research output: Contribution to journalArticle


It is demonstrated that micron-sized particles suspended in fluid near oscillating interfaces experience strong inertial displacements above and beyond the fluid streaming. Experiments with oscillating bubbles show rectified particle lift over extraordinarily short (millisecond) times. A quantitative model on both the oscillatory and the steady time scales describes the particle displacement relative to the fluid motion. The formalism yields analytical predictions confirming the observed scaling behavior with particle size and experimental control parameters. It applies to a large class of oscillatory flows with applications from particle trapping to size sorting.

Original languageEnglish (US)
Article number052001
JournalPhysical Review Fluids
Issue number5
StatePublished - May 2017

ASJC Scopus subject areas

  • Computational Mechanics
  • Modeling and Simulation
  • Fluid Flow and Transfer Processes

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