Giant adsorption of microswimmers: duality of shape asymmetry and wall curvature

Abstract

The effect of shape asymmetry of microswimmers on their adsorption capacity at confining channel walls is studied by a simple dumbbell model. For a shape polarity of a forward-swimming cone, like the stroke-averaged shape of a sperm, extremely long wall retention times are found, caused by a non-vanishing component of the propulsion force pointing steadily into the wall, which grows exponentially with the self-propulsion velocity and the shape asymmetry. A direct duality relation between shape asymmetry and wall curvature is proposed and verified. Our results are relevant for the design microswimmer with controlled wall-adhesion properties. In addition, we confirm that pressure in active systems is strongly sensitive to the details of the particle-wall interactions.

arXiv comment6 pages, 7 figures

References in corpus (16)

• The hydrodynamics of swimming microorganisms
• Physics of Microswimmers - Single Particle Motion and Collective Behavior
• Hydrodynamic attraction of swimming microorganisms by surfaces
• Fluid dynamics and noise in bacterial cell-cell and cell-surface scattering
• Confinement Stabilizes a Bacterial Suspension into a Spiral Vortex
• Ciliary contact interactions dominate surface scattering of swimming eukaryotes
• Hydrodynamic capture of microswimmers into sphere-bound orbits
• Dynamics of Self-Propelled Particles Under Strong Confinement
• Nonequilibrium equation of state in suspensions of active colloids
• Geometric capture and escape of a microswimmer colliding with an obstacle
• Self-Propelled Rods near Surfaces
• Anomalous Thermomechanical Properties of a Self-propelled Colloidal Fluid
• Active particles under confinement: Aggregation at the wall and gradient formation inside a channel
• Controlling active self-assembly through broken particle symmetries
• Filling an emulsion drop with motile bacteria
• Disrupting the wall accumulation of human sperm cells by artificial corrugation

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