The relation between the microscopic structure and shear viscosity of liquid water was analyzed by calculating the cross-correlation between the shear stress and the two-body density using the molecular dynamics simulation. The slow viscoelastic relaxation that dominates the steady-state shear viscosity was ascribed to the destruction of the hydrogen-bonding network structure along the compression axis of the shear distortion, which resembles the structural change under isotropic hydrostatic compression. It means that the shear viscosity of liquid water reflects the anisotropic destruction–formation dynamics of the hydrogen-bonding network.

中文翻译：

---

液态水剪切粘度的结构成因

通过使用分子动力学模拟计算剪切应力与两体密度之间的互相关性，分析了液态水的微观结构与剪切粘度之间的关系。主导稳态剪切粘度的缓慢粘弹性弛豫归因于沿剪切变形压缩轴的氢键网络结构的破坏，这类似于各向同性静水压下的结构变化。这意味着液态水的剪切粘度反映了氢键网络的各向异性破坏-形成动力学。