Active particles in viscosity gradients
arXiv:1906.07932 · doi:10.1103/PhysRevLett.123.158006
Abstract
Microswimmers in nature often experience spatial gradients of viscosity. In this work we develop theoretical results for the dynamics of active particles, biological or otherwise, swimming through viscosity gradients. We model the active particles using the squirmer model, and show how viscosity gradients lead to viscotaxis for squirmers, and how the effects of viscosity gradients depend on the swimming gait of the microswimmers. We also show how such gradients in viscosity can be used to control active particles and suggest a mechanism to sort them based on their swimming style.
5 pages, 2 figures
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Cited by in corpus (24)
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- Self-solidifying active droplets showing memory-induced chirality
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- Hunting active Brownian particles: Learning optimal behavior
- Active spheroids in viscosity gradients
- Active noise-driven particles under space-dependent friction in one dimension
- Dynamics of microswimmers near a liquid-liquid interface with viscosity difference
- Shear and bulk acceleration viscosities in simple fluids
- Hydrodynamic particle interactions in linear and radial viscosity gradients
- Anisotropic active Brownian particle with a fluctuating propulsion force
- Ray Optics for Gliders
- Viscotaxis of Beating Flagella at Surfaces
- Inverted Sedimentation of Active Particles in Unbiased ac Fields
- Swimming efficiency in viscosity gradients
- Viscous tweezers: controlling particle orientation with viscosity
- Sedimentation and shear-induced dynamics of spheroids in fluids with spatial viscosity variations
- Elastic interactions compete with persistent cell motility to drive durotaxis
- Light-Activated Motion, Geometry- and Confinement-Induced Optical Effects of 2D Platelets in a Nematic Liquid Crystal
- Viscotaxis of chiral microswimmer in viscosity gradients
- Hydrodynamics of thermally-driven chiral propulsion and separation