Transport of active ellipsoidal particles in ratchet potentials
arXiv:1505.02335 · doi:10.1063/1.4867283
Abstract
Rectified transport of active ellipsoidal particles is numerically investigated in a two-dimensional asymmetric potential. The out-of-equilibrium condition for the active particle is an intrinsic property, which can break thermodynamical equilibrium and induce the directed transport. It is found that the perfect sphere particle can facilitate the rectification, while the needlelike particle destroys the directed transport. There exist optimized values of the parameters (the self-propelled velocity, the torque acting on the body) at which the average velocity takes its maximal value. For the ellipsoidal particle with not large asymmetric parameter, the average velocity decreases with increasing the rotational diffusion rate, while for the needlelike particle (very large asymmetric parameter), the average velocity is a peaked function of the rotational diffusion rate. By introducing a finite load, particles with different shapes (or different self-propelled velocities) will move to the opposite directions, which is able to separate particles of different shapes (or different self-propelled velocities).
arXiv comment7pages, 8 figures
References in corpus (26)
- Brownian motors: noisy transport far from equilibrium
- The hydrodynamics of swimming microorganisms
- Artificial Brownian motors: Controlling transport on the nanoscale
- Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles
- Athermal Phase Separation of Self-Propelled Particles with no Alignment
- Statistical Mechanics of Interacting Run-and-Tumble Bacteria
- A bacterial ratchet motor
- Circular motion of asymmetric self-propelling particles
- Active Jamming: Self-propelled soft particles at high density
- Self-propelled Janus particles in a ratchet: Numerical simulations
- Active colloidal suspensions exhibit polar order under gravity
- Deformable self-propelled particles
- Traffic jams, gliders, and bands in the quest for collective motion
- Flow pattern in the vicinity of self-propelling hot Janus particles
- Collective dynamics of self-propelled particles with variable speed
- Capturing self-propelled particles in a moving microwedge
- Rectification and diffusion of self-propelled particles in a two-dimensional corrugated channel
- Negative Resistance in Brownian Transport
- Rectification of self-propelled particles by symmetric barriers
- Active Brownian particles with velocity-alignment and active fluctuations
- Multiple current reversals in forced inhomogeneous ratchets
- Active motion assisted by correlated stochastic torques
- Transport of overdamped Brownian particles in a two-dimensional tube: Nonadiabatic regime
- Escape rate of an active Brownian particle over a potential barrier
- Noise-induced vortex reversal of self-propelled particles
- Active Brownian motion of an asymmetric rigid particle
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- Inclusions, Boundaries and Disorder in Scalar Active Matter
- Enhanced motility in a binary mixture of active nano/microswimmers
- Activated barrier crossing dynamics of a Janus particle carrying cargo
- Pattern Formation and Transport for Externally Driven Active Matter on Periodic Substrates
- Mechanochemical Active Ratchet
- Particle-Wall Alignment Interaction and Active Brownian Diffusion Through Narrow Channels
- Diffusion dynamics of an overdamped active ellipsoidal particle in two dimensions
- Curvature induces and enhances transport of spinning colloids through narrow channels
- Nanoswimmers in a ratchet potential: Effects of a transverse rocking force
- Effect of Convection Rolls in Motility-Induced Phase Separation of Active Janus Particles