We review the literature on swimming in complex fluids. A classification is proposed by
comparing the length-and timescales of a swimmer with those of nearby obstacles …

Active suspensions, such as suspensions of self-propelled microorganisms and related
synthetic microswimmers, are known to undergo complex dynamics and pattern formation as …

The hydrodynamics of an archetypal low-Reynolds number swimmer, called “squirmer,”
near a wall has been numerically studied. For a single squirmer, depending on the …

Viscoelastic stress relaxation is a basic characteristic of soft matter systems such as colloids,
gels, and biological networks. Although the Maxwell model of linear viscoelasticity provides …

We consider the tracer diffusion D rr that arises from the run-and-tumble motion of low
Reynolds number swimmers, such as bacteria. Assuming a dilute suspension, where the …

We discuss the path of a tracer particle as a microswimmer moves past on an infinite,
straight trajectory. If the tracer is sufficiently far from the path of the swimmer it moves in a …

Active matter exhibits various forms of nonequilibrium states in the absence of external
forcing, including macroscopic steady-state currents. Such states are often too complex to be …

We study shear-induced migration in a dilute suspension of microswimmers (modelled as
active Brownian particles or ABPs) subject to plane Poiseuille flow. For wide channels …

The experiments of Leptos et al.[Phys. Rev. Lett. 103, 198103 (2009) PRLTAO 0031-9007
10.1103/PhysRevLett. 103.198103] show that the displacements of small particles affected …

A kinetic model and three-dimensional numerical simulations are applied to study the
dynamics in suspensions of run-and-tumble aerotactic bacteria confined in free-standing …