3D model for surface accumulation of chiral and non-chiral microswimmers
arXiv:2401.05237 · doi:10.1103/PhysRevE.111.045405
Abstract
Persistent motion of microswimmers near boundaries is known to result in surface accumulation. Recently it was shown experimentally that surface accumulation of microswimmers is impacted primarily by steric forces and short-ranged hydrodynamics. A way to control surface accumulation is by reducing the contact surface area between swimmers and surface by modifying its topography, typically through the application of microscale structure. In this work, we introduce a three-dimensional(3D) model of a microswimmer navigating a volume bounded by a top and bottom surface. We describe the swimmer-surface interaction with an effective short-ranged hydrodynamic alignment force, and study numerically the effect of surface textures, modelled by convex obstacles, on the surface accumulation of chiral and non-chiral microswimmers. We find that, depending on the angular velocity of the swimmer, and the alignment force, convex obstacles can either hinder or enhance surface accumulation. We discuss potential applications to sorting of microswimmers by their angular velocity.
References in corpus (19)
- Active Particles in Complex and Crowded Environments
- Physics of Microswimmers - Single Particle Motion and Collective Behavior
- Swimming in circles: Motion of bacteria near solid boundaries
- Hydrodynamic attraction of swimming microorganisms by surfaces
- Fluid dynamics and noise in bacterial cell-cell and cell-surface scattering
- Probing Neutral Majorana Fermion Edge Modes with Charge Transport
- The 2019 Motile Active Matter Roadmap
- Computational models for active matter
- Dynamics of a Brownian circle swimmer
- Hydrodynamic capture of microswimmers into sphere-bound orbits
- Geometric capture and escape of a microswimmer colliding with an obstacle
- Sorting of Chiral Microswimmers
- Bacteria display optimal transport near surfaces -- bacteria as intermittent active chiral particles: trapped by hydrodynamics, escaping by adhesion
- The topography of the environment alters the optimal search strategy for active particles
- A Geometric Criterion for the Optimal Spreading of Active Polymers in Porous Media
- Enhanced propagation of motile bacteria on surfaces due to forward scattering
- Ideal circle microswimmers in crowded media
- Effective diffusivity of microswimmers in a crowded environment
- Random motion of a circle microswimmer in a random environment