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High-speed optical imaging of liquid film flow and liquid macro-slip over free surfaces with different surface energies
ID Polajnar, Marko (Avtor), ID Bizjan, Benjamin (Avtor), ID Širok, Brane (Avtor), ID Kalin, Mitjan (Avtor)

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Izvleček
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.

Jezik:Angleški jezik
Ključne besede:high-speed optical imaging, liquid slip, surface energy, surface tension, viscosity
Vrsta gradiva:Članek v reviji
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Status publikacije:Objavljeno
Različica publikacije:Nerecenzirani rokopis
Leto izida:2017
Št. strani:f. 557-566
Številčenje:Vol. 29, iss. 8
PID:20.500.12556/RUL-106780 Povezava se odpre v novem oknu
UDK:532(045)
ISSN pri članku:1557-6833
DOI:10.1002/ls.1388 Povezava se odpre v novem oknu
COBISS.SI-ID:15511579 Povezava se odpre v novem oknu
Datum objave v RUL:18.03.2019
Število ogledov:1394
Število prenosov:1142
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Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:hitra kamera, zdrs v tekočinah, površinska energija, površinska napetost, viskoznost

Projekti

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0231
Naslov:Tribologija

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