Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session R16: Glassy Dynamics: From Simple Models to Biological Tissues II
8:00 AM–10:24 AM,
Thursday, March 18, 2021
Sponsoring Units: GSNP DSOFT
Chair: Patrick Charbonneau, Duke University
Abstract: R16.00008 : Mechanism of Clogging in Microfluidic Devices*
9:24 AM–9:36 AM
Sydney W Holway
Jeffrey S. Guasto
Clogging is a sudden interruption of flow in microparticle suspensions accompanied by aggregation of particles that occurs in many applications ranging from filtration media to microfluidic devices. While a comprehensive understanding of this process is essential to regulating and preventing clogging in these systems, the microscopic mechanisms underlying clog formation remain elusive. The rate of clog formation is, however, known to be determined by the ratio of the particle size to the constriction size and other factors including the presence of particle-surface and particle-particle adhesion. Complemented by high-speed imaging of microfluidic experiments, we develop a computational model of clog formation that accounts for hydrodynamic and steric surface interactions. Pore scale simulations of flowing suspensions through constrictions are used to analyze the formation of clogged structures. We also analyze the stability of the resulting configurations for a range of geometries. The effect of additional influences such as adhesion and prospects for control will be discussed.
*The authors acknowledge funding from the NSF grant DMR-1654283 and a summer scholarship from Tufts University.
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