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Article

Particle Entrapment in Line Elastohydrodynamic Contacts and the Influence of Intermolecular (van der Waals) Forces

KADMOS Engineering Ltd., 3 Princes Mews, Hounslow TW3 3RF, UK
Lubricants 2020, 8(5), 60; https://doi.org/10.3390/lubricants8050060
Received: 6 April 2020 / Revised: 13 May 2020 / Accepted: 18 May 2020 / Published: 25 May 2020
(This article belongs to the Special Issue Tribology across Scales)
A metallic particle passing through concentrated rolling-sliding contacts is often linked to surface damage for particles larger than the available gap. At the instant of particle pinching, force balancing dictates particle entrapment and passing through the contact or rejection. It is vital to include all major forces in this process. This study revisits the analytical entrapment model previously published by the author for spherical micro-particles by incorporating a force so far overlooked in related studies, namely the van der Waals intermolecular force and, additionally, surface roughness effects. In conjunction with particle mechanical and fluid forces, this provides an almost complete set to use for correct force balancing. A parametric analysis shows the effect of several geometrical, mechanical, rheological, and surface parameters on spherical particle entrapment and reveals the significance of the van der Waals force for particles smaller than about 5–10 μm in diameter. View Full-Text
Keywords: particle; entrapment; contact; van der Waals particle; entrapment; contact; van der Waals
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MDPI and ACS Style

Nikas, G.K. Particle Entrapment in Line Elastohydrodynamic Contacts and the Influence of Intermolecular (van der Waals) Forces. Lubricants 2020, 8, 60. https://doi.org/10.3390/lubricants8050060

AMA Style

Nikas GK. Particle Entrapment in Line Elastohydrodynamic Contacts and the Influence of Intermolecular (van der Waals) Forces. Lubricants. 2020; 8(5):60. https://doi.org/10.3390/lubricants8050060

Chicago/Turabian Style

Nikas, George K. 2020. "Particle Entrapment in Line Elastohydrodynamic Contacts and the Influence of Intermolecular (van der Waals) Forces" Lubricants 8, no. 5: 60. https://doi.org/10.3390/lubricants8050060

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