Giant adsorption of microswimmers: duality of shape asymmetry and wall curvature
arXiv:1503.02924 · doi:10.1103/PhysRevE.91.050302
Abstract
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 non-vanishing 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.
6 pages, 7 figures
References in corpus (10)
- The hydrodynamics of swimming microorganisms
- Physics of Microswimmers - Single Particle Motion and Collective Behavior
- Hydrodynamic attraction of swimming microorganisms by surfaces
- Fluid dynamics and noise in bacterial cell-cell and cell-surface scattering
- Ciliary contact interactions dominate surface scattering of swimming eukaryotes
- Nonequilibrium equation of state in suspensions of active colloids
- Geometric capture and escape of a microswimmer colliding with an obstacle
- Self-Propelled Rods near Surfaces
- Filling an emulsion drop with motile bacteria
- Disrupting the wall accumulation of human sperm cells by artificial corrugation
Cited by in corpus (11)
- Swimming in Complex Fluids
- Emergent probability fluxes in confined microbial navigation
- Activity-controlled clogging and unclogging of micro-channels
- Inclusions, Boundaries and Disorder in Scalar Active Matter
- Critical adsorption of polyelectrolytes onto planar and convex highly charged surfaces: the nonlinear Poisson-Boltzmann approach
- Active particles with polar alignment in ring-shaped confinement
- Three-body correlations and conditional forces in suspensions of active hard disks
- Self-propulsion against a moving membrane: enhanced accumulation and drag force
- Inertial self-propelled particles in anisotropic environments
- Stability of interlocked self-propelled dumbbell clusters
- Noncentral forces mediated between inclusions in a bath of active Brownian rods