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  • High-speed optical imaging of liquid film flow and liquid macro-slip over free surfaces with different surface energies [Elektronski vir]
    Polajnar, Marko ...
    High-speed optical imaging is introduced as a visualization method to investigate the film-flow properties of liquids with different surface tensions and viscosities (water, poly-alpha-olefin oil, ... and glycerol) over free rotating surfaces with different surface energies and polarities (steel, and two different diamond-like-carbon - DLC coatings, i.e. DLC, and F-DLC). It was found that the polar surface energy strongly influences the structural dynamics of the liquid film's flow and the film's slip. Namely, a decrease in the polar surface energy results in a less stable filmwith de-wetting areas and breakups into streams, as well as in a larger amount of film slip, which was most clearly expressed by the F-DLC. It was also found that the combination of a high surface tension and a low viscosity provides the largest amount of liquid slip, with the most obvious breakup of the liquid film being observed with water, which clearly exhibits these properties.
    Vir: Lubrication science [Elektronski vir]. - ISSN 1557-6833 (Vol. 29, iss. 8, Dec. 2017, f. 557-566)
    Vrsta gradiva - e-članek
    Leto - 2017
    Jezik - angleški
    COBISS.SI-ID - 15511579

    Povezava(-e):

    http://onlinelibrary.wiley.com/doi/10.1002/ls.1388/pdf
    Repozitorij Univerze v Ljubljani – RUL
    DOI

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