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Fast inertial particle manipulation in oscillating flows

Raqeeb Thameem1, Bhargav Rallabandi2, and Sascha Hilgenfeldt1,*

  • 1Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
  • 2Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA

  • *sascha@illinois.edu
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Phys. Rev. Fluids 2, 052001(R) – Published 3 May, 2017

DOI: https://doi.org/10.1103/PhysRevFluids.2.052001

Abstract

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.

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Phys. Rev. Fluids 2, 052001(R)– Published 3 May, 2017
  • Received 21 October 2016
Article part of CHORUS

©2017 American Physical Society

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