1202.4362 (P. K. Ghosh et al.)

Detectable inertial effects on Brownian transport through narrow pores    [PDF]

P. K. Ghosh, P. Hanggi, F. Marchesoni, F. Nori, G. Schmid

We investigate the transport of suspended Brownian particles dc driven along
corrugated narrow channels in a regime of finite damping. We demonstrate that
inertial corrections cannot be neglected as long as the width of the channel
bottlenecks is smaller than an appropriate particle diffusion length, which
depends on both, the temperature and the strength of the dc drive. Therefore,
transport through sufficiently narrow constrictions turns out to be sensitive
to the viscosity of the suspension fluid. Applications to colloidal systems are
discussed.

View original: http://arxiv.org/abs/1202.4362