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Hydrodynamic Interactions Can Induce Jamming in Flow-Driven Systems.

Eric Cereceda-López1,2, Dominik Lips3, Antonio Ortiz-Ambriz1,2,4

  • 1Departament de Física de la Matèria Condensada, Universitat de Barcelona, Barcelona 08028, Spain.

Physical Review Letters
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Summary
This summary is machine-generated.

Hydrodynamic interactions hinder particle transport across barriers in flow-driven systems, unlike in force-driven systems. This study reveals how these interactions jam particle currents, impacting collective phenomena in soft matter and biology.

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Area of Science:

  • Soft matter physics
  • Fluid dynamics
  • Biological systems

Background:

  • Hydrodynamic interactions are crucial for collective phenomena in fluid-dispersed particle systems.
  • Previous studies showed these interactions facilitate force-driven motion over barriers.

Purpose of the Study:

  • To investigate the effect of hydrodynamic interactions on flow-driven particle transport across barriers.
  • To determine if hydrodynamic interactions hinder or facilitate transport in a vortex flow system.

Main Methods:

  • Experimental setup using rotating optical traps to create vortex flow.
  • Theoretical modeling to analyze particle dynamics and interactions.
  • Observation of particle currents and density-dependent jamming.

Main Results:

  • Hydrodynamic interactions were found to hinder particle transport across barriers in a flow-driven system.
  • A jamming-like decrease in particle currents with increasing density was observed for large barriers.
  • The theoretical model confirmed hydrodynamic interactions as the cause of jamming.

Conclusions:

  • The impact of hydrodynamic interactions on transport is reversed in flow-driven systems compared to force-driven systems.
  • Findings suggest a generic feature of flow-driven transport and its implications for collective particle behavior.
  • This research provides new insights into particle dynamics in complex fluid environments.