Dispersion of a suspension plug in oscillatory pressure-driven flow

Francis R. Cui, Amanda A. Howard, Martin R. Maxey, and Anubhav Tripathi
Phys. Rev. Fluids 2, 094303 – Published 22 September 2017

Abstract

We investigate the dispersion of finite lengths of concentrated suspended particles, or suspension plugs, in a microcapillary as they are sheared in an oscillating pressure-driven flow. In the experiments, plugs of neutrally buoyant, noncolloidal particles (90-μm mean diameter) suspended in viscous fluid at low and high concentrations are observed for various values of applied strain of this cyclic shearing flow. No significant increase in the overall plug length is seen near the centerline after numerous cycles. However, significant streamwise particle migration was observed near the walls of the capillary, becoming more pronounced with increasing strain amplitude. Related numerical simulations for a suspension plug sheared in a planar channel show similar results and elucidate the dynamics for this strongly inhomogeneous flow and the anomalous particle fluxes that develop.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
7 More
  • Received 29 November 2016

DOI:https://doi.org/10.1103/PhysRevFluids.2.094303

©2017 American Physical Society

Physics Subject Headings (PhySH)

Fluid Dynamics

Authors & Affiliations

Francis R. Cui1, Amanda A. Howard2, Martin R. Maxey2,*, and Anubhav Tripathi1

  • 1Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island 02912, USA
  • 2Division of Applied Mathematics, Brown University, Providence, Rhode Island 02912, USA

  • *Martin_Maxey@Brown.edu

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 2, Iss. 9 — September 2017

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
×