1. Growth of clogs in parallel microchannels
- Author
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Emmanuel Villermaux, Alban Sauret, Katarzyna Somszor, Emilie Dressaire, University of California [Santa Barbara] (UC Santa Barbara), University of California (UC), Surface du Verre et Interfaces (SVI), Saint-Gobain-Centre National de la Recherche Scientifique (CNRS), Mechanical and Aerospace Engineering Department [NYU Tandon School of Engineering], NYU Tandon School of Engineering, Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Fluides, automatique, systèmes thermiques (FAST), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), ANR-16-CE30-0009,ProLiFiC,Particules confinées dans un film liquide mince(2016), University of California [Santa Barbara] (UCSB), University of California, and SAINT-GOBAIN-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[PHYS.PHYS.PHYS-FLU-DYN]Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn] ,Work (thermodynamics) ,Materials science ,Classical Physics ,Microfluidics ,Computational Mechanics ,FOS: Physical sciences ,02 engineering and technology ,01 natural sciences ,010305 fluids & plasmas ,Clogging ,Filter (large eddy simulation) ,0103 physical sciences ,parasitic diseases ,Deposition (phase transition) ,ComputingMilieux_MISCELLANEOUS ,Fluid Flow and Transfer Processes ,Microchannel ,Aggregate (composite) ,Applied Mathematics ,Mechanical Engineering ,Fluid Dynamics (physics.flu-dyn) ,Mechanics ,Physics - Fluid Dynamics ,021001 nanoscience & nanotechnology ,Volumetric flow rate ,physics.flu-dyn ,Modeling and Simulation ,0210 nano-technology - Abstract
Author(s): Sauret, Alban; Somszor, Katarzyna; Villermaux, Emmanuel; Dressaire, Emilie | Abstract: During the transport of colloidal suspensions in microchannels, the deposition of particles can lead to the formation of clogs, typically at constrictions. Once a clog is formed in a microchannel, advected particles form an aggregate upstream from the site of the blockage. This aggregate grows over time, which leads to a dramatic reduction of the flow rate. In this paper, we present a model that predicts the growth of the aggregate formed upon clogging of a microchannel. We develop an analytical description that captures the time evolution of the volume of the aggregate, as confirmed by experiments performed using a pressure-driven suspension flow in a microfluidic device. We show that the growth of the aggregate increases the hydraulic resistance in the channel and leads to a drop in the flow rate of the suspensions. We then derive a model for the growth of aggregates in multiple parallel microchannels where the clogging events are described using a stochastic approach. The aggregate growths in the different channels are coupled. Our work illustrates the critical influence of clogging events on the evolution of the flow rate in microchannels. The coupled dynamics of the aggregates described here for parallel channels is key to bridge clogging at the pore scale with macroscopic observations of the flow rate evolution at the filter scale.
- Published
- 2018
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