Research into resonance phenomena in gas-vapor bubbles

Authors

DOI:

https://doi.org/10.15587/1729-4061.2018.123957

Keywords:

sound waves, gas-vapor bubble, resonance frequency, multi-bubble, surface active substances

Abstract

In order to calculate resonating gas bubbles, the mathematical model was supplemented by taking into account phase-transition processes on the surface of a bubble in gas-vapor media, as well as the thermal effects at gas dissolution in fluid. A series of calculations of the resonance mode for bubbles of dimensions of 0.5‒3 mm in water at temperatures from +1 to +99 °C and atmospheric pressure was performed. As a result of mathematical modeling, the possibility of resonance in gas-vapor bubbles in water in the frequency range of 0.5–5 kHz was established.

It was shown that in the resonance mode the amplitude of oscillations of the wall of a bubble first increases rapidly and then is stabilized at the level of 30‒50 % of the radius. It was established that motion velocity of the walls of a bubble under resonance conditions can exceed 6 m/s. It was shown that in the compression mode internal pressure of a bubble can increase by three times or decrease by two times compared with ambient pressure. Dependence of approximation resonance frequency of air bubbles in water on their diameter was established. It was found that in the resonance mode, temperature of gas-vapor medium of a bubble periodically decreases by 6 °C and increases by 12 °C in comparison with the original one. In this case, the temperature of the surface of a bubble decreases by 1 °C and increases by 7 °C. It was shown that favorable conditions for water vapor condensation (fog formation) are created at the stage of the growth of a bubble.

The schematic of the research setup and the results of field observations of gas-vapor bubbles under condition of the influence of sound waves was presented. The existence of resonance of bubbles at calculation frequencies was proved and formation of bubbles was established experimentally. The phenomena of a bubble division and its explosion were illustrated. It was found that addition of surface active substances extends the frequency range of formation of multi-bubbles by five times and contributes to an increase in the number of small bubbles inside a large one.

The research results can be applied to intensification of various technological processes related to heat and mass exchange in gas-vapor systems.

Author Biographies

Аnatoliy Pavlenko, Kielce University of Technology Tysiaclecia Panstwa Polskiego str., 7, Kielce, Poland, 25-314

Doctor of Technical Sciences, Professor

Department of Building Physics and Renewable Energy

Bohdan Kutnyi, Poltava National Technical University named after Yuri Kondratyuk Pershotravneviy ave., 24, Poltava, Ukraine, 36011

PhD, Associate Professor

Department of heat and gas supply, ventilation and heat and power engineering

Tatiana Kugaevska, Poltava National Technical University named after Yuri Kondratyuk Pershotravneviy ave., 24, Poltava, Ukraine, 36011

PhD, Associate Professor

Department of heat and gas supply, ventilation and heat and power engineering

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Published

2018-02-20

How to Cite

Pavlenko А., Kutnyi, B., & Kugaevska, T. (2018). Research into resonance phenomena in gas-vapor bubbles. Eastern-European Journal of Enterprise Technologies, 1(5 (91), 39–47. https://doi.org/10.15587/1729-4061.2018.123957

Issue

Vol. 1 No. 5 (91) (2018): Applied physics

Section

Applied physics

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Copyright (c) 2018 Аnatoliy Pavlenko, Bohdan Kutnyi, Tatiana Kugaevska

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