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

Abstract

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.

Keywords

kavitacija;Kelvin-Helmholtzova nestabilnost;mikro kanali;numerične simulacije;cavitation;Kelvin-Helmholtz instability;microchannel;numerical simulation;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 519.876.5:532.528(045)
COBISS: 56979971 Link will open in a new window
ISSN: 2076-3417
Parent publication: Applied sciences
Views: 334
Downloads: 145
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Other data

Secondary language: Slovenian
Secondary keywords: kavitacija;Kelvin-Helmholtzova nestabilnost;mikrokanali;numerične simulacije;
Type (COBISS): Article
Pages: str. 1-12
Volume: ǂVol. ǂ11
Issue: ǂiss. ǂ6
Chronology: Mar. 2021
DOI: 10.3390/app11062644
ID: 12717710