# Self-propelled Janus particles in a ratchet: numerical simulations.

@article{Ghosh2013SelfpropelledJP, title={Self-propelled Janus particles in a ratchet: numerical simulations.}, author={Pulak Kumar Ghosh and Vyacheslav R. Misko and Fabio Marchesoni and Franco Nori}, journal={Physical review letters}, year={2013}, volume={110 26}, pages={ 268301 } }

Brownian transport of self-propelled overdamped microswimmers (like Janus particles) in a two-dimensional periodically compartmentalized channel is numerically investigated for different compartment geometries, boundary collisional dynamics, and particle rotational diffusion. The resulting time-correlated active Brownian motion is subject to rectification in the presence of spatial asymmetry. We prove that ratcheting of Janus particles can be orders of magnitude stronger than for ordinary…

## 150 Citations

Rectification of self-propelled particles in entropic barriers: finite size effects

- Engineering
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Transport of finite size self-propelled particles is numerically investigated in a two-dimensional channel. Because of the existence of the self-propelled speed, the self-propelled particles exhibit…

Entropic stochastic resonance of a self-propelled Janus particle

- Physics
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Entropic stochastic resonance is investigated when a self-propelled Janus particle moves in a double-cavity container. Numerical simulation results indicate the entropic stochastic resonance can…

Communication: Escape kinetics of self-propelled Janus particles from a cavity: numerical simulations.

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The mean exit time of elliptic Janus particles from narrow two-dimensional cavities with reflecting walls is found to be a minimum when the self-propulsion length is equal to the cavity size and the optimum mean escape time is found as a function of theSelfpropulsion velocity, translational diffusion, and particle shape.

Response of active Brownian particles to boundary driving.

- PhysicsPhysical review. E
- 2019

Underdamped active Brownian particles in a sheared channel geometry observe counterintuitive phenomena stemming from the interplay of activity, interparticle interactions, and the boundary driving, including a flow reversal near the wall and an induced polarization of the particle self-propulsion directions.

Entropic ratchet transport of interacting active Brownian particles.

- PhysicsThe Journal of chemical physics
- 2014

It is found that the interaction between active particles can greatly affect the ratchet transport and, for the strong interaction, the average velocity is independent of the interaction.

Transport of underdamped active particles in ratchet potentials.

- PhysicsSoft matter
- 2017

It is found that the ratchet effect of active noninteracting particles occurs in a single direction in the overdamped limit, and by suitably tailoring the parameters, underdamped active particles with different self-propulsion forces can move in different directions and can be separated.

Direct numerical simulation of the self-propelled Janus particle: use of grid-refined fluctuating lattice Boltzmann method

- Engineering, PhysicsMicrofluidics and Nanofluidics
- 2019

The study of the microscopic propelling mechanism of anisotropic Janus particles often involves the analysis of motion at multi-time scale. In this paper, an efficient method is developed for…

Diffusion of chiral janus particles in convection rolls

- Physics
- 2020

The diffusion of an artificial active particle in a two-dimensional periodic pattern of stationary convection cells is investigated by means of extensive numerical simulations. In the limit of large…

Multiple current reversals of Brownian particles in periodic hydrodynamical channels

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- 2015

Transport of Brownian particles in a periodic channel coexisting with an energetic barrier is investigated in the presence of a curl-free force and a divergence-free force. It is found that the phase…

How entropy and hydrodynamics cooperate in rectifying particle transport

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- 2013

Using the analytical Fick-Jacobs approximation formalism and extensive Brownian dynamics simulations we study particle transport through two-dimensional periodic channels with triangularly shaped…

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