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首页> 外文会议>Leeds-Lyon Symposium on Tribology; 20000905-08; Lyon(FR) >Lubrication Processes near Wall Asperities: a Molecular Dynamics Study
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Lubrication Processes near Wall Asperities: a Molecular Dynamics Study

机译：壁面粗糙附近的润滑过程：分子动力学研究

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摘要

Molecular dynamics simulation has been employed to get an insight into the lubrication process in the vicinity of asperities of a rough wall. The lubrication process in a boundary lubrication regime in ultra-thin films is studied with the purpose of obtaining lubricant film local properties. In particular we would like to study the effect of molecular size of lubricant on those properties. Simulations were conducted for two sizes of linear chain molecules. The larger molecule has 100 segments on its backbone. Results reveal enhanced shear stress and first normal stress difference near the tips of asperities. Molecular size plays important role in quantitative results for lubricant films.
机译：分子动力学模拟已被用来深入了解粗糙壁粗糙表面附近的润滑过程。为了获得润滑膜的局部特性，研究了超薄膜在边界润滑状态下的润滑过程。特别是，我们想研究润滑剂分子大小对那些性能的影响。对两种大小的线性链分子进行了模拟。较大的分子在其主链上具有100个片段。结果显示，在粗糙尖端附近，剪切应力和第一法向应力差增大。分子大小在润滑膜的定量结果中起着重要作用。

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