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Updated: Aug 9, 2025

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Published on: February 22, 2018
Clogging of a Rectangular Slit by a Spherical Soft Particle
Charles Paul Moore1,2, Julien Husson2, Arezki Boudaoud2
1Institut Pasteur, Université Paris Cité, Physical microfluidics and Bioengineering, 25-28 Rue du Dr Roux, 75015 Paris, France.
Abstract:
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.
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