Numerical insight into the Kelvin-Helmholtz instability appearance in cavitating flow

Pipp, Peter (avtor), Hočevar, Marko (avtor), Dular, Matevž (avtor)

Recently the development of Kelvin-Helmholtz instability in cavitating flow in Venturi microchannels was discovered. Its importance is not negligible, as it destabilizes the shear layer and promotes instabilities and turbulent eddies formation in the vapor region, having low density and momentum. In the present paper, we give a very brief summary of the experimental findings and in the following, we use a computational fluid dynamics (CFD) study to peek deeper into the onset of the Kelvin-Helmholtz instability and its effect on the dynamics of the cavitation cloud shedding. Finally, it is shown that Kelvin-Helmholtz instability is beside the re-entrant jet and the condensation shock wave the third mechanism of cavitation cloud shedding in Venturi microchannels. The shedding process is quasi-periodic.

• Jezik: Angleški jezik
• Ključne besede: cavitation, Kelvin-Helmholtz instability, microchannel, numerical simulation
• 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: 12 str.
• Številčenje: Vol. 11, iss. 6, art. 2644
• PID: 20.500.12556/RUL-125677
• UDK: 519.876.5:532.528(045)
• ISSN pri članku: 2076-3417
• DOI: 10.3390/app11062644
• COBISS.SI-ID: 56979971
• Datum objave v RUL: 01.04.2021

Gradivo je del revije

• Naslov: Applied sciences
• Skrajšan naslov: Appl. sci.
• Založnik: MDPI
• ISSN: 2076-3417
• COBISS.SI-ID: 522979353

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.
• Začetek licenciranja: 16.03.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: kavitacija, Kelvin-Helmholtzova nestabilnost, mikrokanali, numerične simulacije