Žan Boček (Avtor), Martin Petkovšek (Avtor), Samuel J. Clark (Avtor), Kamel Fezzaa (Avtor), Matevž Dular (Avtor)

Povzetek

The paper investigates the oil–water emulsification process inside a micro-venturi channel. More specifically, the possible influence of Kelvin-Helmholtz instability on the emulsification process. High-speed visualizations were conducted inside a square venturi constriction with throat dimensions of 450 µm by 450 µm, both under visible light and X-Rays. We show that cavity shedding caused by the instability results in the formation of several cavity vortices. Their rotation causes the deformation of the oil stream into a distinct wave-like shape, combined with fragmentation into larger drops due to cavitation bubble collapse. Later on, the cavity collapse further disperses the larger drops into a finer emulsion. Thus, it turns out that the Kelvin-Helmholtz instability is similarly characteristic for hydrodynamic cavitation emulsification inside a microchannel as is the Rayleigh-Taylor instability for acoustically driven emulsion formation.

Ključne besede

emulsion;hydrodynamic cavitation;Kelvin-Helmholtz instability;Venturi microchannels;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 532.528
COBISS: 201951491 Povezava se bo odprla v novem oknu
ISSN: 1350-4177
Št. ogledov: 46
Št. prenosov: 2
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: emulzija;hidrodinamska kavitacija;Kelvin-Helmholtzova nestabilnost;Venturijevi mikrokanali;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-9
Zvezek: ǂVol. ǂ108, [article no.] 106970
Čas izdaje: Aug. 2024
DOI: 10.1016/j.ultsonch.2024.106970
ID: 24549645