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Article

Numerical Simulation of Breathing Mode Oscillation on Bubble Detachment

1
Graduate School of Science and Engineering, Saitama University, Sakura, Saitama 338-8570, Japan
2
Division of Human Support and Production Sciences, Saitama University, Sakura, Saitama 338-8570, Japan
3
Computational Dynamics K.K., Siemens PLM Software, Shin-Yokohama, Yokohama 222-0033, Japan
*
Author to whom correspondence should be addressed.
Fluids 2020, 5(2), 96; https://doi.org/10.3390/fluids5020096
Received: 21 April 2020 / Revised: 29 May 2020 / Accepted: 13 June 2020 / Published: 16 June 2020
(This article belongs to the Special Issue Advances in Numerical Methods for Multiphase Flows)
When a bubble detaches from a nozzle immersed in water, a sound is emitted owing to the detachment. The bubble deformation and sound emission generated after detachment has been investigated in many studies, in which the breathing mode with a natural frequency was discussed based on the dynamics of the interface between the air and water. In this study, the deformation of a bubble was observed, and the sound emitted upon detachment was measured experimentally. To analyze the bubble deformation process, a computational fluid dynamics (CFD) simulation was conducted using the volume of fluid (VOF) method to predict the sound emission. In the analysis, the deformation behavior, the oscillation frequencies, sound pressure, and radius variation were discussed by comparing the numerical and experimental data. Furthermore, the natural frequency and low frequency vibrations were discussed based on the interference between the detached bubbles and the air column vibrations. View Full-Text
Keywords: two-phase flow; bubble release; breathing mode; sound emission; computational fluid dynamics (CFD); volume of fluid (VOF) two-phase flow; bubble release; breathing mode; sound emission; computational fluid dynamics (CFD); volume of fluid (VOF)
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MDPI and ACS Style

Oku, T.; Hirahara, H.; Akimoto, T.; Tsuchida, D. Numerical Simulation of Breathing Mode Oscillation on Bubble Detachment. Fluids 2020, 5, 96. https://doi.org/10.3390/fluids5020096

AMA Style

Oku T, Hirahara H, Akimoto T, Tsuchida D. Numerical Simulation of Breathing Mode Oscillation on Bubble Detachment. Fluids. 2020; 5(2):96. https://doi.org/10.3390/fluids5020096

Chicago/Turabian Style

Oku, Takao, Hiroyuki Hirahara, Tomohiro Akimoto, and Daiki Tsuchida. 2020. "Numerical Simulation of Breathing Mode Oscillation on Bubble Detachment" Fluids 5, no. 2: 96. https://doi.org/10.3390/fluids5020096

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