Journal
SOFT MATTER
Volume 13, Issue 39, Pages 6981-6987Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sm01226h
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Funding
- Institut Pierre-Gilles de Gennes (equipement d'excellence, Investissements d'avenir'', programme) [ANR-10-EQPX-34]
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We discuss in this paper the nature of the friction generated as a drop glides on a textured material infused by another liquid. Different regimes are found, depending on the viscosities of both liquids. While a viscous drop simply obeys a Stokes-type friction, the force opposing a drop moving on a viscous substrate becomes non-linear in velocity. A liquid on an infused material is surrounded by a meniscus, and this specific feature is proposed to be responsible for the special frictions observed on both adhesive and non-adhesive substrates.
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