Particle Segregation and Dynamics in Confined Flows

Dino Di Carlo, Jon F. Edd, Katherine J. Humphry, Howard A. Stone, and Mehmet Toner
Phys. Rev. Lett. 102, 094503 – Published 3 March 2009

Abstract

Nonlinearity in finite-Reynolds-number flow results in particle migration transverse to fluid streamlines, producing the well-known “tubular pinch effect” in cylindrical pipes. Here we investigate these nonlinear effects in highly confined systems where the particle size approaches the channel dimensions. Experimental and numerical results reveal distinctive dynamics, including complex scaling of lift forces with channel and particle geometry. The unique behavior described in this Letter has broad implications for confined particulate flows.

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  • Received 20 October 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.094503

©2009 American Physical Society

Authors & Affiliations

Dino Di Carlo1,*, Jon F. Edd1,†, Katherine J. Humphry2, Howard A. Stone2, and Mehmet Toner1

  • 1BioMEMS Resource Center, Center for Engineering in Medicine and Surgical Services, Massachusetts General Hospital, Shriners Hospital for Children, and Harvard Medical School, Boston, Massachusetts 02114, USA
  • 2Department of Physics and School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA

  • *Corresponding author. Present address: Department of Bioengineering, University of California, Los Angeles, CA 90095, USA. dicarlo@seas.ucla.edu
  • Corresponding author. jonedd2@gmail.com

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Vol. 102, Iss. 9 — 6 March 2009

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