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Cavitation bubble collapse in a vicinity of a liquid-liquid interface : basic research into emulsification process
Orthaber, Uroš (Avtor), Zevnik, Jure (Avtor), Petkovšek, Rok (Avtor), Dular, Matevž (Avtor)

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Izvleček
The initial motivation for the study was to gain deeper understanding into the background of emulsion preparation by ultrasound (cavitation). In our previous work (Perdih et al., 2019) we observed rich phenomena occurring near the liquid-liquid interface which was exposed to ultrasonic cavitation. Although numerous studies of bubble dynamics in different environments (presence of free surface, solid body, shear flow and even variable gravity field) exist, one can find almost no reports on the interaction of a bubble with a liquid-liquid interface. In the present work we conducted a number of experiments where single cavitation bubble dynamics was observed on each side of the oil-water interface. These were accompanied by corresponding simulations. We investigated the details of bubble interface interaction (deformation, penetration). As predicted, by the anisotropy parameter the bubble always jets toward the interface if it grows in the lighter liquid and correspondingly away from the interface if it is initiated inside the denser liquid. We extended the analysis to the relationships of various bubble characteristics and the anisotropy parameter. Finally, based on the present and our previous study (Perdih et al., 2019), we offer new insights into the physics of ultrasonic emulsification process.

Jezik:Angleški jezik
Ključne besede:cavitation, liquid-liquid interface, bubble, oil, emulsion, simulation
Vrsta gradiva:Članek v reviji (dk_c)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2020
Št. strani:str. 1-15
Številčenje:Vol. 68
UDK:532.528(045)
ISSN pri članku:1350-4177
DOI:10.1016/j.ultsonch.2020.105224 Povezava se odpre v novem oknu
COBISS.SI-ID:20084995 Povezava se odpre v novem oknu
Število ogledov:104
Število prenosov:64
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P2-0401
Naslov:Energetsko strojništvo

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P2-0270
Naslov:Proizvodni sistemi, laserske tehnologije in spajanje materialov

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:BI-US/18-19-031
Naslov:

Številka projekta:771567
Naslov:CABUM

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:kavitacija, mehurčki, emulzija

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