Lubricated sliding friction: Role of interfacial fluid slip and surface roughness
| Autor: | P. Mangiagalli, Bo N. J. Persson, C. Rotella, Michele Scaraggi |
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| Přispěvatelé: | Rotella, C., Persson, B. N. J., Scaraggi, M., Mangiagalli, P. |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Shear thinning Biophysics Surfaces and Interfaces General Chemistry Slip (materials science) Surface finish Silicone oil Condensed Matter::Soft Condensed Matter Physics::Fluid Dynamics chemistry.chemical_compound Natural rubber chemistry visual_art Fluid dynamics Surface roughness visual_art.visual_art_medium Shear stress Interfacial phenomena [Flowing Matter] ddc:530 General Materials Science Composite material Biotechnology |
| Zdroj: | The European physical journal / E Soft matter E 43(2), 9 (2020). doi:10.1140/epje/i2020-11933-4 |
| ISSN: | 1292-895X |
| Popis: | Abstract. We derive approximate mean field equations for the fluid flow between elastic solids with randomly rough surfaces including interfacial fluid slip and shear thinning. We present numerical results for the fluid flow and friction factors for realistic systems, in particular, we consider the case of an elastic cylinder with random surface roughness in relative sliding contact with a flat rigid (low-energy) counter-surface. We present experimental data for the sliding friction between rubber stoppers and glass barrels lubricated with baked-on silicone oil. We find that the frictional shear stress acting in the rubber asperity contact regions is nearly velocity independent for velocities in the 10-1000μm/s range, and very small $ \tau_{{\rm f}} \approx 0.04$τf≈0.04 MPa, while for bare glass in silicone oil $ \tau_{{\rm f}}$τf is much larger and velocity dependent. Graphical abstract |
| Databáze: | OpenAIRE |
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