Particle segregation and dynamics in confined flows

Dino Di Carlo, Jon F. Edd, Katherine J. Humphry, Howard A. Stone, Mehmet Toner

Research output: Contribution to journalArticlepeer-review

359 Scopus citations


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.

Original languageAmerican English
Article number094503
JournalPhysical review letters
Issue number9
StatePublished - Mar 2 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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