20.500.12556/RUL-159634 Kelvin-Helmholtz instability as one of the key features for fast and efficient emulsification by hydrodynamic cavitation The paper investigates the oil–water emulsification process inside a micro-venturi channel. More specifically, the possible influence of Kelvin-Helmholtz instability on the emulsification process. High-speed visualizations were conducted inside a square venturi constriction with throat dimensions of 450 µm by 450 µm, both under visible light and X-Rays. We show that cavity shedding caused by the instability results in the formation of several cavity vortices. Their rotation causes the deformation of the oil stream into a distinct wave-like shape, combined with fragmentation into larger drops due to cavitation bubble collapse. Later on, the cavity collapse further disperses the larger drops into a finer emulsion. Thus, it turns out that the Kelvin-Helmholtz instability is similarly characteristic for hydrodynamic cavitation emulsification inside a microchannel as is the Rayleigh-Taylor instability for acoustically driven emulsion formation. emulsion hydrodynamic cavitation Kelvin-Helmholtz instability Venturi microchannels emulzija hidrodinamska kavitacija Kelvin-Helmholtzova nestabilnost Venturijevi mikrokanali true false true Angleški jezik Slovenski jezik Članek v reviji 2024-07-16 14:07:16 2024-07-16 14:07:21 2024-07-19 03:40:31 0000-00-00 00:00:00 2024 0 0 9 str. Vol. 108, art. 106970 Aug. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532.528 1350-4177 10.1016/j.ultsonch.2024.106970 201951491 Bocek...-Kelvin-Helmholtz_instability_as_one_of_the_key_features_for_fast_and_efficient_emulsification_by_hydrodynamic_cavitation.pdf Bocek...-Kelvin-Helmholtz_instability_as_one_of_the_key_features_for_fast_and_efficient_emulsification_by_hydrodynamic_cavitation.pdf 1 451F65401542EDCF77C479B4F5D9AAA7 57c6cc0608ed52d7c2c8e0eee483eaf3e7968de37140379aba005da7e2273245 9f554ab2-436c-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=187741 https://www.sciencedirect.com/science/article/pii/S1350417724002189 1 ead96ff2-436b-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=187740 Fakulteta za strojništvo 0 0 0