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Cavitation bubble dynamics and sonochemiluminescence activity inside sonicated submerged flow tubesSarac, Busra Ekim ...Bubble dynamics and luminol emissions of cavitation in sub-millimeter-sized perfluoroalkoxy alkane (PFA) flow tubes, submerged in an ultrasonic bath reactor, are studied at 27.2 kHz driving ... frequency. Nucleation of cavitation inside the tubes only takes place via a free interface, realized here in form of an alternating water-air slug flow. High-speed recordings show that cavitation bubbles in the water slugs often develop localized structures in form of clusters or bubble “plugs”, and that such structures can be seeded via a single pinch-off from the free interface. Within the structures, bubbles strongly interact and frequently undergo merging or splitting events. Due to the mutual interaction and resulting motion, bubbles often collapse with a fast displacement, suggesting jetting dynamics. Bubble compression ratios are estimated on basis of observed individual bubble dynamics and numerical fitting by a single bubble model that takes the tube wall into account. The resulting peak temperatures around 3500 K allow for dissociation of water vapor. This is in accordance with observed sonochemiluminescence from luminol, originating from active bubble zones in the tubes.Vir: Chemical engineering and processing = Génie des procédés = Verfahrenstechnik. - ISSN 0255-2701 (Vol. 150, Apr. 2020, str. 1-9)Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasleLeto - 2020Jezik - angleškiCOBISS.SI-ID - 177208323
Avtor
Sarac, Busra Ekim |
Stephens, Dwayne Savio |
Eisener, Julian |
Rosselló, Juan Manuel |
Mettin, Robert
Teme
sonochemistry |
luminol |
ultrasound |
nucleation |
high-speed observations |
bubble dynamics |
microchannels |
acoustics |
cavitation |
sonokemija |
luminol |
ultrazvok |
nukleacija |
visokohitrostna opazovanja |
dinamika mehurčkov |
akustika |
mikokanali |
kavitacija
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Sarac, Busra Ekim | ![]() |
Stephens, Dwayne Savio | ![]() |
Eisener, Julian | ![]() |
Rosselló, Juan Manuel | 57808 |
Mettin, Robert | ![]() |
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