中文摘要：

利用分子动力学模拟方法探究了外加载荷作用下纳米尺度受限水膜的流动特性.仿真结果表明：受限空间内的水膜随着载荷的增加,其出现分层现象和黏度增加,当黏度超过一个临界值后,在分层和黏度增加共同作用下,水膜的流动状态将由层流和湍流的混合状态过渡到单一的层流状态.同时,随着受限空间壁面的切向运动,受限水膜均会出现边界滑移现象,且随着载荷的增加,滑移现象越发显著.但当水膜单一层流状态形成后,受限空间壁面的滑移速度,对水膜的边界滑移长度影响并不显著.

英文摘要：

Molecular dynamics simulation method is used to explore the flow characteristics of nanoconfined water under dynamic load. The simulation results show that layers phenomenon was observed and the viscosity increased with the increasing load on the nanoconfined water. As the viscosity is higher than a critical value, the mix by laminar and turbulent state of the confined water would convert to a single state of laminar flow under the effect of layer structure and higher viscosity. Meanwhile, with the tangential motion of wall, the confined water appeared boundary slip phenomenon. And with the increase of load, slip became even more significant. In a single state of laminar flow, the velocity of wall had no significant influence on the slip length of confined water.