20.500.12556/RUL-127475 Kelvin-Helmholtz instability governs the cavitation cloud shedding in Venturi microchannel 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. cavitation Kelvin-Helmholtz instability Venturi microchannel kavitacija Kelvin-Helmholtzova nestabilnost Venturijev mikrokanal true false true Angleški jezik Slovenski jezik Članek v reviji 2021-06-09 14:18:51 2021-06-09 14:18:53 2022-09-06 03:51:31 0000-00-00 00:00:00 2021 0 0 7 str. Vol. 142, art. 103700 Sep. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532.528(045) 0301-9322 10.1016/j.ijmultiphaseflow.2021.103700 66420227 RAZ_Podbevsek_Darjan_2021.pdf RAZ_Podbevsek_Darjan_2021.pdf 1 3FA452B216EEA8702B540389A52E13E3 d8496320afb8f431993608f67bbff45e42e8b9355ebaacf148d4e6003ea5c67e 602c8773-c91f-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=143890 https://www.sciencedirect.com/science/article/pii/S0301932221001488 0 c53e9cb6-c91c-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=143885 Fakulteta za strojništvo 0 0 0