LPMCN, Université de Lyon, UMR 5586 Université Lyon 1 et CNRS, F-69622 Villeurbanne, France.
J Chem Phys. 2011 Dec 7;135(21):214705. doi: 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.
本文讨论了为了考虑纳米孔隙中固液滑移现象，必须对毛细填充动力学的标准描述进行修正的方法。特别关注的是滑移长度远远大于孔径的情况。结果表明，液体粘度没有作用，流动仅由壁面处液体的摩擦系数控制。此外，在 Washburn 区域，填充速度与管半径无关。最后，分子动力学模拟表明，这种标准描述不能描述水在碳纳米管中的早期毛细填充阶段，因为必须考虑管入口处的粘性耗散。
