Directional locking and the role of irreversible interactions in deterministic hydrodynamics separations in microfluidic Devices

Manuel Balvin, Eunkyung Sohn, Tara Iracki, German Drazer, Joelle Frechette

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

We performed macroscopic experiments on the motion of a sphere through an array of obstacles that highlight the deterministic nature of the lateral displacements that lead to particle separation in microfluidic systems. The motion of the spheres is irreversible and displays directional locking. The locking directions can be predicted with a single parameter that distinguishes between reversible and irreversible particle-obstacle collisions. These results stress the need to incorporate irreversible interactions to predict the movement of a non-Brownian sphere passing through a periodic array.

Original languageEnglish (US)
Article number078301
JournalPhysical review letters
Volume103
Issue number7
DOIs
StatePublished - Aug 11 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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