Nos tutelles

CNRS Université de Bordeaux Solvay


Accueil > Publications > 2012

Solutal Convection in Confined Geometries : Enhancement of Colloidal Transport

par Salmon Jean-Baptiste - publié le , mis à jour le

We evidence experimentally and theoretically that natural convection driven by solutal density
differences in a molecular binary mixture can boost the transport of colloids. We demonstrate that
such buoyancy-driven flows have a negligible influence on the gradients that generate them, for moderate
Rayleigh numbers in a confined geometry. These flows therefore do not homogenize the binary mixture
but can disperse very efficiently large solutes. We illustrate the relevance of such effects thanks to several
original experiments : drying of confined droplets, microfluidic evaporation, and interdiffusion in microfluidic

- link to publisher’s site