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Fiber alignment in oscillating confined shearing flows

Scott Strednak1, Jason E. Butler1,*, Laurence Bergougnoux2, and Élisabeth Guazzelli3

  • 1Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, USA
  • 2Aix-Marseille Université, CNRS, IUSTI, Marseille, France
  • 3Université de Paris, CNRS, Matière et Systèmes Complexes (MSC) UMR 7057, Paris, France

  • *Corresponding author: butler@che.ufl.edu
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Phys. Rev. Fluids 6, 014302 – Published 7 January, 2021

DOI: https://doi.org/10.1103/PhysRevFluids.6.014302

Abstract

Fiber orientation in oscillatory shearing flow was studied both experimentally and numerically. Optical measurements were made using a custom flow cell containing rigid, noncolloidal fibers suspended at high concentration in a Newtonian fluid. Simulations that account for hydrodynamic drag and excluded volume predict fiber alignment in the vorticity direction for some conditions, in agreement with the measurements. Vorticity alignment was found to be a complex function of strain amplitude and fiber concentration, confinement, and aspect ratio.

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Phys. Rev. Fluids 6, 014302– Published 7 January, 2021
  • Received 25 July 2020
  • Accepted 14 December 2020
Article part of CHORUS
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