Particle entrapment in elliptical, elastohydrodynamic, rough contacts and the influence of intermolecular (van der Waals) forces
| Autor: | George K. Nikas |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Mechanical Engineering Intermolecular force Thermodynamics 02 engineering and technology Surfaces and Interfaces 021001 nanoscience & nanotechnology Surfaces Coatings and Films Physics::Fluid Dynamics Entrapment symbols.namesake 020303 mechanical engineering & transports 0203 mechanical engineering Surface roughness symbols Particle van der Waals force 0210 nano-technology |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 235:2227-2246 |
| ISSN: | 2041-305X 1350-6501 |
| Popis: | The entrapment/rejection process of spherical, rigid microparticles in elliptical, rough elastohydrodynamic contacts is modelled. An earlier model of the author is extended to include van der Waals intermolecular forces, in addition to mechanical (reaction and friction) and fluid–particle forces. Surface roughness effects are also introduced in terms of the intermolecular force formulation and in the microscale friction (particle–asperity) sub-model. Possibilities related to particle entry into a contact are quantified by weight factors and performance indices. A total entrapment index is defined and linked to the probability of particle entrapment. A parametric analysis investigates the effect of the intermolecular particle force on the entrapment probability by varying the contact load, lubricant viscosity, elastic modulus of the contacting solids, contact velocity and the macroscopic (Coulomb) coefficient of friction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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