Diffusive mass transfer by non equilibrium fluctuations: Fick's law revisited
Statistical Mechanics
2009-10-31 v1 Soft Condensed Matter
Abstract
Recent experimental and theoretical works have shown that giant fluctuations are present during diffusion in liquid systems. We use linearized fluctuating hydrodynamics to calculate the net mass transfer due to these non equilibrium fluctuations. Surprisingly the mass flow turns out to coincide with the usual Fick's one. The renormalization of the hydrodynamic equations allows us to quantify the gravitational modifications of the diffusion coefficient induced by the gravitational stabilization of long wavelength fluctuations.
Cite
@article{arxiv.cond-mat/0006163,
title = {Diffusive mass transfer by non equilibrium fluctuations: Fick's law revisited},
author = {Doriano Brogioli and Alberto Vailati},
journal= {arXiv preprint arXiv:cond-mat/0006163},
year = {2009}
}
Comments
6 pages, submitted to PRL