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Pisma v Zhurnal Tekhnicheskoi Fiziki, 2022 Volume 48, Issue 13, Pages 46–48 (Mi pjtf7350)

Spreading rate of a toroidal air bubble in water

V. V. Nikulin, E. A. Chashnikov

Lavrentyev Institute of Hydrodynamics of Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

Abstract: The rise of a toroidal bubble in water obtained by injecting a pulsed jet of air into the water through a nozzle vertically upwards has been experimentally investigated. It was found that, despite the decrease in the cross-section of the toroidal bubble during the ascent, its radius grows linearly depending on the distance traveled, as in the case of self-similar vortex rings. The coefficient of expansion of the bubble at different volumes of injected air is determined. A comparison was made with toroidal bubbles obtained when balloons burst under water. A qualitative explanation of the observed differences is given.

Keywords: vortex ring, toroidal bubble.

Received: 29.04.2022
Revised: 20.05.2022
Accepted: 20.05.2022

DOI: 10.21883/PJTF.2022.13.52745.19241



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© Steklov Math. Inst. of RAS, 2025