Three-sphere low-Reynolds-number swimmer with a cargo container
Department of Physics and Astronomy, University of Sheffield, S3 7RH, Sheffield, UK
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Accepted: 25 January 2008
Published online: 14 February 2008
A recently introduced model for an autonomous swimmer at low Reynolds number that is comprised of three spheres connected by two arms is considered when one of the spheres has a large radius. The Stokes hydrodynamic flow associated with the swimming strokes and net motion of this system can be studied analytically using the Stokes Green's function of a point force in front of a sphere of arbitrary radius R provided by Oseen. The swimming velocity is calculated, and shown to scale as 1/R 3 with the radius of the sphere.
PACS: 87.19.ru Locomotion – / 47.15.G- Low-Reynolds-number (creeping) flows – / 62.25.-g Mechanical properties of nanoscale systems –
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2008