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.

5 pages; 1 figure

References in corpus (5)

• The hydrodynamics of swimming microorganisms
• Hydrodynamic attraction of swimming microorganisms by surfaces
• Fluid dynamics and noise in bacterial cell-cell and cell-surface scattering
• Designing phoretic micro- and nano-swimmers
• Phoretic self-propulsion at finite Péclet numbers

Cited by in corpus (21)

• Geometric tuning of self-propulsion for Janus catalytic particles
• Self-propulsion near the onset of Marangoni instability of deformable active droplets
• An active particle in a complex fluid
• State diagram of a three-sphere microswimmer in a channel
• Force moments of an active particle in a complex fluid
• Active matter invasion of a viscous fluid: unstable sheets and a no-flow theorem
• Optimal swimmer can be puller, pusher, or neutral depending on the shape
• Axisymmetric spheroidal squirmers and self-diffusiophoretic particles
• Active Stokesian Dynamics
• Hydrochemical interactions of phoretic particles: a regularized multipole framework
• Higher-order force moments of active particles
• Spontaneous polarization and locomotion of an active particle with surface-mobile enzymes
• Hydro-chemical interactions in dilute phoretic suspensions: from individual particle properties to collective organization
• Diffusiophoretic propulsion of an isotropic active colloidal particle near a finite-sized disk embedded in a planar fluid-fluid interface
• Self-diffusiophoretic propulsion of a spheroidal particle in a shear-thinning fluid
• Collective dynamics and rheology of confined phoretic suspensions
• Non-Brownian diffusion and chaotic rheology of autophoretic disks
• Stokes traction on an active particle
• Active dipolar spheroids in shear flow and transverse field: Population splitting, cross-stream migration and orientational pinning
• Hydrodynamics of flow sensing in plankton
• The stress tensor of dilute active colloidal suspensions