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Lift induced by slip inhomogeneities in lubricated contacts

Abstract : Lubrication forces depend to a high degree on elasticity, texture, charge, chemistry, and temperature of the interacting surfaces. Therefore, by appropriately designing surface properties, we may tailor lubrication forces to reduce friction, adhesion and wear between sliding surfaces or control assembly, repulsion, and collision of interacting particles. Here, we show that variations of slippage on one of the contacting surfaces induce a normal (lift) force. We demonstrate the consequences of this force on the mobility of a cylinder traveling near a wall and show the emergence of active-like particle trajectories, such as oscillation, migration, and propulsion. Our study has implications for understanding how inhomogeneous biological interfaces interact with their environment; it also reveals a new method of patterning surfaces for controlling the motion of nearby particles.
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https://hal.archives-ouvertes.fr/hal-02388468
Contributor : Thomas Salez <>
Submitted on : Wednesday, December 18, 2019 - 1:24:30 PM
Last modification on : Friday, May 1, 2020 - 1:37:47 AM

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  • HAL Id : hal-02388468, version 1
  • ARXIV : 1912.02617

Citation

Aidan Rinehart, Uǧis Lācis, Thomas Salez, Shervin Bagheri. Lift induced by slip inhomogeneities in lubricated contacts. 2019. ⟨hal-02388468v1⟩

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