Brownian dynamics of a microswimmer

Abstract

We report on dynamic properties of a simple model microswimmer composed of three spheres and propelling itself in a viscous fluid by spinning motion of the spheres under zero net torque constraint. At a fixed temperature and increasing the spinning frequency, the swimmer demonstrates a transition from dissipation-dominated to a pumping-dominated motion regime characterized by negative effective friction coefficient. In the limit of high frequencies, the diffusion of the swimmer can be described by a model of an active particle with constant velocity.

Submitted

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• Mesoscale Structures at Complex Fluid-Fluid Interfaces: a Novel Lattice Boltzmann / Molecular Dynamics Coupling
• The Raspberry Model for Hydrodynamic Interactions Revisited. I. Periodic Arrays of Spheres and Dumbbells
• Collective dynamics in systems of active Brownian particles with dissipative interactions
• Active Brownian motion of emulsion droplets: Coarsening dynamics at the interface and rotational diffusion
• Noisy swimming at low Reynolds numbers
• Coherent Hydrodynamic Coupling for Stochastic Swimmers
• Kinematic matrix theory and universalities in self-propellers and active swimmers
• Optimal motion of triangular magnetocapillary swimmers
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• Gaussian Memory in Kinematic Matrix Theory for Self-Propellers
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• Effective swimming strategies in low Reynolds number flows
• Tank-treading as a means of propulsion in viscous shear flows
• Active Brownian motion of an asymmetric rigid particle
• Morphological Effects on Bacterial Brownian Motion: Validation of a Chiral Two-Body Model