受限纳米流中从流体力学到动力学状态的交叉
Crossover from Hydrodynamics to the Kinetic Regime in Confined Nanoflows
摘要：
我们对受限纳米流进行了实验研究，该纳米流是由简单流体中的球体在平坦固体壁附近振荡产生的。改变振荡频率，限制长度尺度和流体平均自由程在很宽的范围内提供了一个详细的流动图。我们使用这个实验图来构建一个尺度函数，它描述了整个参数空间中的纳米流，包括流体动力学和动力学机制。我们的标度函数统一了以前的理论的基础上的滑移边界条件和有效粘度。
英文摘要：
We present an experimental study of a confined nanoflow, which is generated by a sphere oscillating in the proximity of a flat solid wall in a simple fluid. Varying the oscillation frequency, the confining length scale and the fluid mean free path over a broad range provides a detailed map of the flow. We use this experimental map to construct a scaling function, which describes the nanoflow in the entire parameter space, including both the hydrodynamic and the kinetic regimes. Our scaling function unifies previous theories based on the slip boundary condition and the effective viscosity.
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