Spreading Characteristics of Molecularly Thin Lubricant on Surfaces With Groove-Shaped Textures: Monte Carlo Simulation and Measurement Using PFPE Film
Spreading Characteristics of Molecularly Thin Lubricant on Surfaces With Groove-Shaped Textures: Monte Carlo Simulation and Measurement Using PFPE Film
复制标题
细分子润滑剂在凹槽状纹理表面上的铺展特性：使用 PFPE 薄膜进行蒙特卡罗模拟和测量
DOI：
10.1115/1.1456085
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发表时间：
2002
影响因子：
2.5
通讯作者：
M. Yamada
中科院分区：
文献类型：
--
作者：
Hedong Zhang;Y. Mitsuya;M. Yamada
用Monte Carlo模拟方法研究了分子薄润滑剂在沟槽表面上的铺展特性，并与全氟聚醚（PFPE）薄膜在具有微小沟槽的固体表面上铺展的测量结果进行了比较。在模拟中，通过引入分子与沟槽侧面的相互作用，将基于Ising模型的Monte Carlo方法推广到沟槽表面的情况，并应用于模拟非极性润滑剂在沟槽内的铺展。与光滑表面上的铺展相比，润滑剂在凹槽内迅速铺展，表明润滑剂沿凹槽沿着铺展的加速。在实验中，润滑剂在具有沟槽状纹理的表面上的铺展是利用衍射光在润滑剂覆盖区域中减少或消失的现象来测量的。基于显示润滑剂主要沿着凹槽传播的结果，模拟中获得的加速效应得到了测量的充分证实。
Spreading characteristics of molecularly thin lubricant on a grooved surface have been studied numerically by Monte Carlo simulations and compared with measurements obtained by perfluoropolyether (PFPE) thin film spreading on a solid surface with minute grooves. In the simulations, by incorporating the interactions between molecules and the side surfaces of a groove, the Monte Carlo method based on the Ising model was extended to the case of a surface with grooves and applied to simulate the spreading of non-polar lubricant inside a groove. Compared with the spreading on a smooth surface, lubricant spreads rapidly inside a groove, indicating an acceleration of the spreading along the groove. In the experiments, lubricant spreading on a surface with groove-shaped textures was measured by making use of the phenomenon in which diffracted light decreases or vanishes in the lubricant-covered region. Based on the results showing lubricant spreading predominantly along the groove, the accelerating effect obtained in the simulations is well confirmed by the measurements.