Transport and diffusion of paramagnetic ellipsoidal particles in a rotating magnetic field
arXiv:1806.11072 · doi:10.1103/PhysRevE.97.062151
Abstract
Transport and diffusion of paramagnetic ellipsoidal particles under the action of a rotating magnetic field are numerically investigated in a two-dimensional channel. It is found that paramagnetic ellipsoidal particles in a rotating magnetic field can be rectified in the upper-lower asymmetric channel. The transport and the effective diffusion coefficient are much more different and complicated for active particles, while they have similar behaviors and change a little when applying rotating magnetic fields of different frequencies for passive particles. For active particles, the back-and-forth rotational motion facilitates the effective diffusion coefficient and reduces the rectification, whereas the rotational motion synchronous with the magnetic field suppresses the effective diffusion coefficient and enhances the rectification. There exist optimized values of the parameters (the anisotropic degree, the amplitude and frequency of magnetic field, the self-propelled velocity, and the rotational diffusion rate) at which the average velocity and diffusion take their maximal values. Particles with different shapes, self-propelled speeds, or rotational diffusion rates will move to the opposite directions and can be separated by applying rotating magnetic fields of suitable strength and frequency. Our results can be used to separate particles, orient the particles along any direction at will during motion, and control the particle diffusion.
References in corpus (25)
- Brownian motion of a self-propelled particle
- High-Speed Propulsion of Flexible Nanowire Motors: Theory and Experiments
- Temperature in and out of equilibrium: a review of concepts, tools and attempts
- Current in a three-dimensional periodic tube with unbiased forces
- Weak disorder: anomalous transport and diffusion are normal yet again
- Giant Negative Mobility of Janus Particles in a Corrugated Channel
- Microscopic theory for negative differential mobility in crowded environments
- Nonlinear response of inertial tracers in steady laminar flows: differential and absolute negative mobility
- Weak disorder strongly improves the selective enhancement of diffusion in a tilted periodic potential
- Dispersionless transport in a washboard potential
- Diffusion of Chiral Janus Particles in a Sinusoidal Channel
- Giant transversal particle diffusion in a longitudinal magnetic ratchet
- Clustering of Magnetic Swimmers in a Poiseuille Flow
- Focusing and sorting of ellipsoidal magnetic particles in microchannels
- Nonlinear response and emerging nonequilibrium micro-structures for biased diffusion in confined crowding environments
- Time-Dependent Fluctuations and Superdiffusivity in the Driven Lattice Lorentz Gas
- ac-driven Brownian motors: a Fokker-Planck treatment
- Nonequilibrium fluctuations and enhanced diffusion of a driven particle in a dense environment
- Dynamics of a linear magnetic "microswimmer molecule"
- Negative Differential Mobility and Trapping in Active Matter Systems
- Entropy production of a Brownian ellipsoid in the overdamped limit
- Anomalous force-velocity relation of driven inertial tracers in steady laminar flows
- Transport properties of Brownian particles confined to a narrow channel by a periodic potential
- Extracting work from the magnetic field coupled Brownian particles
- Environment-dependent swimming strategy of Magnetococcus marinus under magnetic field