Oscillations of confined fibres transported in microchannels

M. Nagel, P. T. Brun, H. Berthet, A. Lindner, F. Gallaire, C. Duprat

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

We investigate the trajectories of rigid fibres as they are transported in a pressure-driven flow, at low Reynolds number, in shallow Hele-Shaw cells. The transverse confinement and the resulting viscous friction on these elongated objects, as well as the lateral confinement (i.e. the presence of lateral walls), lead to complex fibre trajectories that we characterize with a combination of microfluidic experiments and simulations using modified Brinkman equations. We show that the transported fibre behaves as an oscillator for which we obtain and analyse a complete state diagram.

Original languageEnglish (US)
Pages (from-to)444-470
Number of pages27
JournalJournal of Fluid Mechanics
Volume835
DOIs
StatePublished - Jan 25 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • Hele-Shaw flows
  • low-Reynolds-number flows
  • microfluidics

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