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© Research
Publication : Physical review letters

Clogging of a Rectangular Slit by a Spherical Soft Particle.

Team: Physical Microfluidics and Bioengineering
Member: Charles Paul Moore
Member: Charles Baroud
Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Physical review letters - 10 Feb 2023

Moore CP, Husson J, Boudaoud A, Amselem G, Baroud CN

Link to Pubmed [PMID] – 36827557

Link to DOI – 10.1103/PhysRevLett.130.064001

Phys Rev Lett 2023 Feb; 130(6): 064001

The capture of a soft spherical particle in a rectangular slit leads to a nonmonotonic pressure-flow rate relation at low Reynolds number. Simulations reveal that the flow induced deformations of the trapped particle focus the streamlines and pressure drop to a small region. This increases the resistance to flow by several orders of magnitude as the driving pressure is increased. As a result, two regimes are observed in experiments and simulations: a flow-dominated regime for small particle deformations, where flow rate increases with pressure, and an elastic-dominated regime in which solid deformations block the flow.