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Numerical Study of the Emission of Acoustic Energy of Single Collapsing Vapor Bubble Near a Rigid Wall

Hangbo Duan / Linya Chen / Xiaoyu Liang

A compressible two-phase solver considering phase transition and thermodynamic effects is developed on OpenFOAM to numerically investigate the dynamics of single cavitation bubble collapse near the rigid wall. A grid independence analysis is conducted, and the accuracy of the pressure field is verified by comparing the numerical results with the experimental results. The emission process of acoustic energy during the bubble collapse is discussed. Moreover, the acoustic radiation energy in the flow field under different dimensionless bubble-wall distances $γ$ is further studied, which is related to the mechanism of cavitation erosion. The results show that $γ -$ value has a significant effect on the amplitude of acoustic energy. The maximum amplitude of acoustic energy accounts for 8% to 25% of the total energy in the flow field when $γ -$ value ranges from 0.1 to 2.0. The amplitude of acoustic energy decreases with $γ$ in the range $0.1 < γ < 0.9$ while increases with $γ$ in the range $0.9 < γ < 2.0$ .

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Numerical Study of the Emission of Acoustic Energy of Single Collapsing Vapor Bubble Near a Rigid Wall

Hangbo Duan / Linya Chen / Xiaoyu Liang

A compressible two-phase solver considering phase transition and thermodynamic effects is developed on OpenFOAM to numerically investigate the dynamics of single cavitation bubble collapse near the rigid wall. A grid independence analysis is conducted, and the accuracy of the pressure field is verified by comparing the numerical results with the experimental results. The emission process of acoustic energy during the bubble collapse is discussed. Moreover, the acoustic radiation energy in the flow field under different dimensionless bubble-wall distances $γ$ is further studied, which is related to the mechanism of cavitation erosion. The results show that $γ -$ value has a significant effect on the amplitude of acoustic energy. The maximum amplitude of acoustic energy accounts for 8% to 25% of the total energy in the flow field when $γ -$ value ranges from 0.1 to 2.0. The amplitude of acoustic energy decreases with $γ$ in the range $0.1 < γ < 0.9$ while increases with $γ$ in the range $0.9 < γ < 2.0$ .

Numerical Study of the Emission of Acoustic Energy of Single Collapsing Vapor Bubble Near a Rigid Wall

Hangbo Duan / Linya Chen / Xiaoyu Liang

A compressible two-phase solver considering phase transition and thermodynamic effects is developed on OpenFOAM to numerically investigate the dynamics of single cavitation bubble collapse near the rigid wall. A grid independence analysis is conducted, and the accuracy of the pressure field is verified by comparing the numerical results with the experimental results. The emission process of acoustic energy during the bubble collapse is discussed. Moreover, the acoustic radiation energy in the flow field under different dimensionless bubble-wall distances $γ$ is further studied, which is related to the mechanism of cavitation erosion. The results show that $γ -$ value has a significant effect on the amplitude of acoustic energy. The maximum amplitude of acoustic energy accounts for 8% to 25% of the total energy in the flow field when $γ -$ value ranges from 0.1 to 2.0. The amplitude of acoustic energy decreases with $γ$ in the range $0.1 < γ < 0.9$ while increases with $γ$ in the range $0.9 < γ < 2.0$ .

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Title:

Numerical Study of the Emission of Acoustic Energy of Single Collapsing Vapor Bubble Near a Rigid Wall

Contributors:

Hangbo Duan (author) / Linya Chen (author) / Xiaoyu Liang (author)

Published in:

Water, Vol 14, Iss 3, p 455 (2022)

Publication date:

2022

ISSN:

DOI:

https://doi.org/10.3390/w14030455

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

Keywords:

cavitation bubble , numerical simulation , acoustic energy , phase transition , compressibility , Hydraulic engineering , TC1-978 , Water supply for domestic and industrial purposes , TD201-500

Metadata by DOAJ is licensed under CC BY-SA 1.0

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