Capillary filling with giant liquid/solid slip: dynamics of water uptake by carbon nanotubes

Details Capillary filling with giant liquid/solid slip: dynamics of water uptake by carbon nanotubes Capillary filling with giant liquid/solid slip: dynamics of water uptake by carbon nanotubes

2011-07-19

arxiv.org/abs/1107.3819v4

Journal of Chemical Physics 135 (2011) 214705

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1063/1.3664622

This article discusses the way the standard description of capillary filling dynamics has to be modified to account for liquid/solid slip in nanometric pores. It focuses in particular on the case of a large slip length compared to the pore size. It is shown that the liquid viscosity does not play a role, and that the flow is only controlled by the friction coefficient of the liquid at the wall. Moreover in the Washburn regime, the filling velocity does not depend on the tube radius. Finally, molecular dynamics simulations suggest that this standard description fails to describe the early stage of capillary filling of carbon nanotubes by water, since viscous dissipation at the tube entrance must be taken into account.

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