Abstract
The formation of water drops underneath nozzles was studied numerically to provide the basis for repeatable experimental drop formation. The drops detached from the nozzle and impacted on a free water surface forming vortex rings. Experimental results obtained through kinematographic studies of the penetration and growth of these vortex rings are presented. Variations of the penetration depth were measured, depending on the nozzle height above the water surface where the drops were formed. The experiments revealed that it is the state of oscillation at impact that defines the penetration length. Interesting variations of the vortex ring diameter with time were recorded. A good overall understanding of the behavior of the diameter variation was obtained when it was plotted as a function of the penetration depth.
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Chapman DS; Critchlow PR (1967) Formation of vortex rings from falling drops. J Fluid Mech 29:
Durst F (1966) Beitrag zur Bildung von Gasblasen an Düsen durch Gasdispersion in Flüssigkeiten, Diplomarbeit. Inst. Thermodynamik der Luft- und Raumfahrt, Universtät Stuttgart
Durst F; Beer H (1969) Blasenbildung an Düsen bei Gasdispersionen in Flüssigkeiten. Chem Ing Techn 41: 1000–1006
Durst F; Fuchs W (1974) Die Bildung von Wirbelringen durch fallende Tropfen und die Dynamik der Wirbelringfortbewegung. SFB 80/ET/23
Krutzsch Ch (1939) Über eine experimentell beobachtete Erscheinung an Wirbelringen bei ihrer translatorischen Bewegung in wirklichen Flüssigkeiten. Ann Phys Ser 5: 35
Kutter V (1916)Die Anwendung on Wirbelringen zur Bestimmung von Oberflächenspannungen. Physikalische Zeitschrift 23: 573–579
Peck B; Sigurdson L (1995) The vortex ring velocity resulting from an impacting water drop. Exp Fluids 18: 351–357
Siemens W (1954) Gasblasen in Düsenplatten, Teil I. Chem Ing Techn 26: 479–496
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Durst, F. Penetration length and diameter development of vortex rings generated by impacting water drops. Experiments in Fluids 21, 110–117 (1996). https://doi.org/10.1007/BF00193914
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DOI: https://doi.org/10.1007/BF00193914