Related Experiment Video
Updated: Apr 16, 2026

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
Published on: February 22, 2018
Rectified motion in an asymmetric channel: the role of hydrodynamic interactions with walls
1Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran.
Abstract:
Dynamics of a Brownian particle in an asymmetric microchannel that is subjected to an external oscillating force is numerically analyzed. In addition to the elastic collisions with the walls that are kind of short range interactions, the long range hydrodynamic influences of the walls have been considered in an approximate way. We demonstrate how the geometrical parameters of the channel change the rectified current of the particle. As a result of numerical calculations, we show that long range hydrodynamic interactions with walls decrease the efficiency of the Brownian ratchet.
Related Concept Videos
Uniform Depth Channel Flow: Problem Solving
Uniform Depth Channel Flow
Irrotational Flow
Hydrostatic Pressure Force on a Curved Surface
Steady, Laminar Flow Between Parallel Plates
Curvilinear Motion: Rectangular Components
As the car advances, its position evolves over time. Quantifying the car's velocity involves computing the...

