Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7002044 | Tribology International | 2018 | 28 Pages |
Abstract
The viscoelasticity of polyalphaolefins confined and sheared in a submicron-to-nanometer-sized gap range was measured. A continuous transition from bulk viscosity to confined viscoelasticity was observed in this gap range. The viscosity increased when the gap was less than around 100â¯nm, whereas the elasticity rapidly increased when the gap was less than 10â¯nm. The shear rate and temperature dependence of the unique viscoelasticity was also measured in the confined state. The enhanced viscosity decreased as the shear rate and the temperature increased. These findings are expected to improve the basic understanding of hydrodynamic lubrication design in narrow gaps widths.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Shintaro Itoh, Yuya Ohta, Kenji Fukuzawa, Hedong Zhang,