Effect of microcontent of oil in water under confined condition

Liran Ma; Jianbin Luo; Chenhui Zhang; Shuhai Liu; Tao Zhu
August 2009
Applied Physics Letters;8/31/2009, Vol. 95 Issue 9, p091908
Academic Journal
The lubricant film thickness between two contacting surfaces is important for the evaluation of lubrication effectiveness. According to the elastohydrodynamic lubrication theory, the film thickness of pure water is usually on the order of a few nanometers. It was found, however, that microcontent of oil contamination can cause a lubricant film more than 100 nm, much thicker than the predicted. The effect of micro-oil content in water between a smooth plate and a highly polished steel ball was investigated. The film forming characteristic of such films was presented. The film formation mechanism and influencing factors were discussed.


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