Molecular Simulations of Kinetic-Friction Modification in Nanoscale Fluid Layers
| Autor: | Steven G. Harris, Matthew R. Farrow, Philip J. Camp, Alexandros Chremos, Raymond F. Watts |
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| Rok vydání: | 2011 |
| Předmět: |
Kinetic friction
ADDITIVES Materials science ROCK FRICTION Automotive Slip (materials science) Chemical groups Molecule Nanoscopic scale chemistry.chemical_classification STATIC FRICTION ORIGIN Mechanical Engineering Friction modifiers Friction modifier Surfaces and Interfaces Polymer DYNAMICS SIMULATION Surfaces Coatings and Films SLIP chemistry Mechanics of Materials Chemical physics Physical chemistry SHEAR POLYMERS FORCES Solvophobic INTERFACES Dynamic modelling |
| Zdroj: | Farrow, M R, Chremos, A, Camp, P J, Harris, S G & Watts, R F 2011, ' Molecular Simulations of Kinetic-Friction Modification in Nanoscale Fluid Layers ', Tribology letters, vol. 42, no. 3, pp. 325-337 . https://doi.org/10.1007/s11249-011-9777-7 |
| ISSN: | 1573-2711 1023-8883 |
| DOI: | 10.1007/s11249-011-9777-7 |
| Popis: | Molecular simulations are used to explore kinetic-friction modification in nanoscale fluid layers of oil and additive confined between sheared parallel walls. The molecules are represented by coarse-grained bead-spring models that reflect the essential solvophilic and solvophobic natures of the chemical groups. The degree of friction modification is surveyed as a function of wall separation, sliding velocity, additive molecular weight and architecture, and oil-additive composition. As a rule, the kinetic-friction coefficient is found to increase first linearly and then logarithmically with increasing sliding velocity. From the results for different additive molecules, some subtle but systematic effects are found that point towards an optimum molecular weight and architecture. |
| Databáze: | OpenAIRE |
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