Abstract

The viscosity of a rarefied gas in nanochannels under normal conditions is studied. The viscosity coefficient is calculated from the Green–Kubo formula using the stochastic molecular method. The interaction of gas molecules with the wall is described by the specular, diffuse, or specular-diffuse laws. Gas temperature and channel height are varied. It is shown that the viscosity in the nanochannel is essentially anisotropic. Along the channel, it almost always coincides with its corresponding bulk viscosity. By varying the accommodation coefficient, the total viscosity of the gas can be either reduced or increased several-fold.

中文翻译：

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纳米通道中气体的粘度

摘要

研究了正常条件下纳米通道中稀有气体的粘度。粘度系数是通过Green-Kubo公式使用随机分子方法计算得出的。气体分子与壁的相互作用由镜面反射，扩散或镜面扩散定律描述。气体温度和通道高度各不相同。结果表明，纳米通道中的粘度基本上是各向异性的。沿着通道，它几乎总是与其相应的本体粘度一致。通过改变调节系数，气体的总粘度可以降低或增加几倍。