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Anomalous Scaling for Hydrodynamic Lubrication of Conformal Surfaces
| العنوان: | Anomalous Scaling for Hydrodynamic Lubrication of Conformal Surfaces |
|---|---|
| المؤلفون: | Richards, James A., Warren, Patrick B., Hodgson, Daniel J. M., Lips, Alex, Poon, Wilson C. K. |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Soft Condensed Matter, Physics - Fluid Dynamics |
| الوصف: | The hydrodynamic regime of the Stribeck curve giving the friction coefficient $\mu$ as a function of the dimensionless relative sliding speed (the Sommerfeld number, $S$) of two contacting non-conformal surfaces is usually considered trivial, with $\mu \sim S$. We predict that for conformal surfaces contacting over large areas, a combination of independent length scales gives rise to a universal power-law with a non-trivial exponent, $\mu\sim S^{2/3}$, for a thick lubrication film. Deviations as the film thins (decreasing $S$) may superficially resemble the onset of elastohydrodynamic lubrication, but are due to a crossover between hydrodynamic regimes. Our experiments as well as recent measurements of chocolate lubrication confirm these predictions. Comment: 5 pages, 4 figures, RevTeX 4.2; supplemental material as SM.pdf |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2306.17696 |
| رقم الانضمام: | edsarx.2306.17696 |
| قاعدة البيانات: | arXiv |
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