论文标题
普通水中的剪切粘度和自扩散
The shear viscosity and self-diffusion in ordinary water
论文作者
论文摘要
该论文致力于对两个重要的运输过程（运动学剪切粘度和自扩散）的详细分析，用于从三个点到临界点的所有液态水状态。我们对剪切粘度的方法基于两个最接近分子层之间相对于彼此转移的摩擦效应。在这种关系中，水中的剪切粘度的性质与氩气完全相似。由于分子的层间位移引起的贡献被认为忽略不计。在两个特征方向上详细研究了水的运动剪切粘度的行为：蒸气 - 液体共存曲线和等温线。至于氩气，假定水中的自扩散是由两个主要贡献形成的，这是由纳米级涡流流体动力模式和分子尺度上分子的集体互混合而引起的。第二类的机理具有良好的精度，由爱因斯坦公式描述，其由分子的硬核半径从对水的剪切粘度分析确定。
The paper is devoted to a detailed analysis of the two important transport processes - the kinematic shear viscosity and the self-diffusion - for all states of liquid water from the triple point to the critical point. Our approach to the shear viscosity is grounded on friction effects between the two nearest molecular layers shifting relative to each other. In this relation, the nature of the shear viscosity in water is fully similar to that in argon. The contribution, caused by interlayer displacements of molecules, is assumed to be negligibly small. The behavior of the kinematic shear viscosities of water is investigated in detail in the two characteristic directions: the vapor-liquid coexistence curve and isotherms. As for argon, it is assumed that the self-diffusion in water is formed by the two main contributions, caused by the molecular transport by nano-scale vortex hydrodynamic modes and collective intermixing of molecules on molecular scales. The mechanism of the second type is with good accuracy described by the Einstein formula with a hard-core radius of a molecule determined from analysis of the shear viscosity of water.
