Mechanism for clogging of microchannels | Zendy

Hans M. Wyss | Zendy; Daniel L. Blair | Zendy; Jeffrey F. Morris | Zendy; Howard A. Stone | Zendy; David A. Weitz | Zendy

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Mechanism for clogging of microchannels

Author(s) -

Hans M. Wyss,

Daniel L. Blair,

Jeffrey F. Morris,

Howard A. Stone,

David A. Weitz

Publication year - 2006

Publication title -

physical review e

Language(s) - English

Resource type - Journals

eISSN - 1550-2376

pISSN - 1539-3755

DOI - 10.1103/physreve.74.061402

Subject(s) - clogging , materials science , volumetric flow rate , particle (ecology) , flow (mathematics) , volume fraction , porous medium , mechanics , volume (thermodynamics) , microfluidics , porosity , particle size , nanotechnology , chemical engineering , composite material , thermodynamics , geology , engineering , physics , oceanography , archaeology , history

We investigate clogging of micro-channels at the single pore level, using microfluidic devices as model porous media. The process of clogging is studied at low volume fractions and high flow rates, a technologically important regime. We show that clogging is independent of particle flow rate and volume fraction, indicating that collective effects do not play an important role. Instead, the average number of particles that can pass through a pore before it clogs scales with the ratio of pore to particle size. We present a simple model that accounts for the data. PACS numbers: 47.55.Kf,47.56.+r,47.61.-k,47.61.Jd,85.85.+j

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