Journal
ENTROPY
Volume 12, Issue 3, Pages 480-489Publisher
MDPI
DOI: 10.3390/e12030480
Keywords
self-organization; entropy production; friction
Categories
Funding
- Gamson fund
- Pedeciba
- ANII
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We consider the Robin Hood model of dry friction to study entropy transfer during sliding. For the polished surface (steady state) we study the probability distribution of slips and find an exponential behavior for all the physically relevant asperity interaction-distance thresholds. In addition, we characterize the time evolution of the sample by its spatial fractal dimension and by its entropy content. Starting from an unpolished surface, the entropy decreases during the Robin Hood process, until it reaches a plateau; thereafter the system fluctuates above the critical height. This validates the notion that friction increases information in the neighborhood of the contacting surface at the expense of losing information in remote regions. We explain the practical relevance of these results for engineering surface processing such as honing.
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