Separation quality of a geometric ratchet
Statistical Mechanics
2009-11-07 v1 Soft Condensed Matter
Abstract
We consider an experimentally relevant model of a geometric ratchet in which particles undergo drift and diffusive motion in a two-dimensional periodic array of obstacles, and which is used for the continuous separation of particles subject to different forces. The macroscopic drift velocity and diffusion tensor are calculated by a Monte-Carlo simulation and by a master-equation approach, using the correponding microscopic quantities and the shape of the obstacles as input. We define a measure of separation quality and investigate its dependence on the applied force and the shape of the obstacles.
Cite
@article{arxiv.cond-mat/0112275,
title = {Separation quality of a geometric ratchet},
author = {C. Keller and Florian Marquardt and C. Bruder},
journal= {arXiv preprint arXiv:cond-mat/0112275},
year = {2009}
}