Macroscopic relations for microscopic properties at the interface between solid substrates and dense fluids.
Macroscopic relations for microscopic properties at the interface between solid substrates and dense fluids.
复制标题
固体基质和致密流体之间界面处微观性质的宏观关系。
DOI：
10.1063/1.5094911
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
R. Hartkamp
中科院分区：
文献类型：
--
作者：
A. Russo;M. Durán;S. Kalliadasis;R. Hartkamp
强约束流体由于在固体表面附近的原子结构而表现出不均匀性。固流界面的状态变量和输运系数局部变化，并依赖于围壁的性质。然而，这些影响的确切机制尚不清楚。在这里，我们利用非平衡分子动力学模拟来仔细研究一系列表面条件和温度下固液界面处的局部流体性质。我们还推导了致密流体粘度和密度分布之间的微观关系。此外，我们提出了经验的现成关系来表示通道中的平均密度和粘度作为温度，壁面相互作用强度和体积密度或粘度的函数。这种关系是微/纳米流体学和摩擦学等技术应用的关键，也是自然现象的关键。
Strongly confined fluids exhibit inhomogeneous properties due to atomistic structuring in close proximity to a solid surface. State variables and transport coefficients at a solid-fluid interface vary locally and become dependent on the properties of the confining walls. However, the precise mechanisms for these effects are not known as of yet. Here, we make use of nonequilibrium molecular dynamics simulations to scrutinize the local fluid properties at the solid-fluid interface for a range of surface conditions and temperatures. We also derive microscopic relations connecting fluid viscosity and density profiles for dense fluids. Moreover, we propose empirical ready-to-use relations to express the average density and viscosity in the channel as a function of temperature, wall interaction strength, and bulk density or viscosity. Such relations are key to technological applications such as micro-/nanofluidics and tribology but also natural phenomena.
影响因子：
3.4
作者：
Westerhausen C;Schnitzler LG;Wendel D;Krzysztoń R;Lächelt U;Wagner E;Rädler JO;Wixforth A
通讯作者：
Wixforth A