Clogging by sieving in microchannels: Application to the detection of contaminants in colloidal suspensions

Alban Sauret, Erin C. Barney, Adeline Perro, Emmanuel Villermaux, Howard A. Stone, Emilie Dressaire

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

We report on a microfluidic method that allows measurement of a small concentration of large contaminants in suspensions of solid micrometer-scale particles. To perform the measurement, we flow the colloidal suspension through a series of constrictions, i.e., a microchannel of varying cross-section. We show and quantify the role of large contaminants in the formation of clogs at a constriction and the growth of the resulting filter cake. By measuring the time interval between two clogging events in an array of parallel microchannels, we are able to estimate the concentration of contaminants whose size is selected by the geometry of the microfluidic device. This technique for characterizing colloidal suspensions offers a versatile and rapid tool to explore the role of contaminants on the properties of the suspensions.

Original languageEnglish (US)
Article number074101
JournalApplied Physics Letters
Volume105
Issue number7
DOIs
StatePublished - Aug 18 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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