Giant adsorption of microswimmers: Duality of shape asymmetry and wall curvature.

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 nonvanishing 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.

• Publication year

  2015

• Venue

  Physical review. E, Statistical, nonlinear, and soft matter physics

• Publication date

  2015-03-10

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1103/PhysRevE.91.050302arXiv 1503.02924PMID 26066105
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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