Kelvin-Helmholtz instability governs the cavitation cloud shedding in Venturi microchannel

Podbevšek, Darjan (avtor), Petkovšek, Martin (avtor), Ohl, Claus-Dieter (avtor), Dular, Matevž (avtor)

The paper shows visualization of cavitation inside a micro-Venturi channel. While the initial aim of the study was to establish supercavitating conditions inside a micro-Venturi, yet we found that this regime is suppressed due to the formation of a Kelvin-Helmholtz instability, which triggers a semi periodical attached cavity collapse. In depth observations using high speed imaging with visible light and X-rays revealed that this is, besides the re-entrant jet and the shock wave, a third mechanism leading to the shedding of cloud cavitation. In addition, a simple model was proposed which explains the formation of the Kelvin-Helmholtz instability in cavitating micro-Venturi and also offers explanation on why this is the dominant mechanism of cavitation cloud shedding at small scales.

• Jezik: Angleški jezik
• Ključne besede: cavitation, Kelvin-Helmholtz instability, Venturi microchannel
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: 7 str.
• Številčenje: Vol. 142, art. 103700
• PID: 20.500.12556/RUL-127475
• UDK: 532.528(045)
• ISSN pri članku: 0301-9322
• DOI: 10.1016/j.ijmultiphaseflow.2021.103700
• COBISS.SI-ID: 66420227
• Datum objave v RUL: 09.06.2021

Gradivo je del revije

• Naslov: International journal of multiphase flow
• Skrajšan naslov: Int. j. multiph. flow
• Založnik: Elsevier
• ISSN: 0301-9322
• COBISS.SI-ID: 25649408

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: kavitacija, Kelvin-Helmholtzova nestabilnost, Venturijev mikrokanal