• Rapid Communication

Shear-induced migration and orientation of rigid fibers in an oscillatory pipe flow

Scott Strednak, Saif Shaikh, Jason E. Butler, and Élisabeth Guazzelli
Phys. Rev. Fluids 3, 091301(R) – Published 10 September 2018
PDFHTMLExport Citation

Abstract

The spatial and orientation distributions of fibers in suspension were measured during oscillatory flow within a circular pipe. The fibers were rigid and non-colloidal, and two aspect ratios (length L to diameter d ratios) of L/d=11 and 23 were tested; the suspending fluid was viscous, Newtonian, and density matched to the particles. As with shear-induced migration of spheres in parabolic flows, fibers in the concentrated suspensions migrated toward the center of the pipe. The migration was similar for the fibers, irrespective of the aspect ratio, at the same dimensionless number density n0L2d (n0 is the number of fibers per unit volume of the bulk suspension), rather than at the same volume fraction. The extent of migration was maximum at n0L2d=0.84 for both aspect ratios. The orientation distribution of the fibers was spatially dependent. Fibers near the center of the channel aligned closely with the flow direction, while fibers near the pipe wall had an enhanced probability of aligning in the vorticity direction.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 8 June 2018

DOI:https://doi.org/10.1103/PhysRevFluids.3.091301

©2018 American Physical Society

Physics Subject Headings (PhySH)

Fluid DynamicsPolymers & Soft Matter

Authors & Affiliations

Scott Strednak1,2, Saif Shaikh1,2, Jason E. Butler2, and Élisabeth Guazzelli1

  • 1Aix-Marseille Univ, CNRS, IUSTI, Marseille, France
  • 2Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, USA

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 3, Iss. 9 — September 2018

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Fluids

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×