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Updated: May 29, 2025

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
Published on: February 22, 2018
Brownian friction dynamics: Fluctuations in sliding distance
R Xu1,2,3, F Zhou1, B N J Persson1,2,3
1Lanzhou Institute of Chemical Physics, State Key Laboratory of Solid Lubrication, Chinese Academy of Sciences, Lanzhou 730000, China.
Abstract:
We have studied the fluctuation (noise) in the position of sliding blocks under constant driving forces on different substrate surfaces. The experimental data are complemented by simulations using a simple spring-block model where the asperity contact regions are modeled by miniblocks connected to the big block by viscoelastic springs. The miniblocks experience forces that fluctuate randomly with the lateral position, simulating the interaction between asperities on the block and the substrate. The theoretical model provides displacement power spectra that agree well with the experimental results.
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