title: Stresslets Induced by Active Swimmers.
abstract: Active particles disturb the fluid around them as force dipoles, or stresslets, which govern their collective dynamics. Unlike swimming speeds, the stresslets of active particles are rarely determined due to the lack of a suitable theoretical framework for arbitrary geometry. We propose a general method, based on the reciprocal theorem of Stokes flows, to compute stresslets as integrals of the velocities on the particle's surface, which we illustrate for spheroidal chemically active particles. Our method will allow tuning the stresslet of artificial swimmers and tailoring their collective motion in complex environments.
authors.affiliation: Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, United Kingdom.
authors.forename: Eric
authors.initials: E
authors.lastname: Lauga
authors.affiliation: LadHyX-Département de Mécanique, Ecole Polytechnique-CNRS, 91128 Palaiseau, France.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Michelin