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Physical investigation of acoustic waves induced by the oscillation and collapse of the single bubble

The objective of this paper is to apply both experimental and numerical methods to investigate acoustic waves induced by the oscillation and collapse of a single bubble. In the experiments, the schlieren technique is used to capture the temporal evolution of the bubble shapes, and the corresponding...

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Detalles Bibliográficos
Autores principales: Huang, Guohao, Zhang, Mindi, Han, Lei, Ma, Xiaojian, Huang, Biao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7803823/
https://www.ncbi.nlm.nih.gov/pubmed/33421930
http://dx.doi.org/10.1016/j.ultsonch.2020.105440
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author Huang, Guohao
Zhang, Mindi
Han, Lei
Ma, Xiaojian
Huang, Biao
author_facet Huang, Guohao
Zhang, Mindi
Han, Lei
Ma, Xiaojian
Huang, Biao
author_sort Huang, Guohao
collection PubMed
description The objective of this paper is to apply both experimental and numerical methods to investigate acoustic waves induced by the oscillation and collapse of a single bubble. In the experiments, the schlieren technique is used to capture the temporal evolution of the bubble shapes, and the corresponding acoustic waves. The results are presented for the single bubble generated by a low-voltage bubble generator in the free field of water. During the numerical simulations, a three-dimensional (3D) weakly compressible model is introduced to investigate the single bubble dynamics, including the generation and propagation of acoustic waves. The results show that (1) Compression wave, rarefaction wave and shock wave are generated during expansion stage, collapse stage and rebound stage of the bubble respectively. (2) Compression waves are induced by the rapid expansion of the bubble and eventually steepen into one shock wave propagating outward in the liquid, then another strong shock wave is emitted at the final collapse stage. The velocity and pressure of the liquid field increases after the shock wave. (3) Rarefaction waves are generated during the collapse stage due to the contraction of the bubble. The rarefaction wave reduces the liquid pressure and its spatial distribution is dispersive. The pressure of these acoustic waves and their effect on the liquid velocity attenuate with the increase of propagation distance.
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spelling pubmed-78038232021-01-22 Physical investigation of acoustic waves induced by the oscillation and collapse of the single bubble Huang, Guohao Zhang, Mindi Han, Lei Ma, Xiaojian Huang, Biao Ultrason Sonochem Original Research Article The objective of this paper is to apply both experimental and numerical methods to investigate acoustic waves induced by the oscillation and collapse of a single bubble. In the experiments, the schlieren technique is used to capture the temporal evolution of the bubble shapes, and the corresponding acoustic waves. The results are presented for the single bubble generated by a low-voltage bubble generator in the free field of water. During the numerical simulations, a three-dimensional (3D) weakly compressible model is introduced to investigate the single bubble dynamics, including the generation and propagation of acoustic waves. The results show that (1) Compression wave, rarefaction wave and shock wave are generated during expansion stage, collapse stage and rebound stage of the bubble respectively. (2) Compression waves are induced by the rapid expansion of the bubble and eventually steepen into one shock wave propagating outward in the liquid, then another strong shock wave is emitted at the final collapse stage. The velocity and pressure of the liquid field increases after the shock wave. (3) Rarefaction waves are generated during the collapse stage due to the contraction of the bubble. The rarefaction wave reduces the liquid pressure and its spatial distribution is dispersive. The pressure of these acoustic waves and their effect on the liquid velocity attenuate with the increase of propagation distance. Elsevier 2020-12-24 /pmc/articles/PMC7803823/ /pubmed/33421930 http://dx.doi.org/10.1016/j.ultsonch.2020.105440 Text en © 2020 The Authors. Published by Elsevier B.V. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Original Research Article
Huang, Guohao
Zhang, Mindi
Han, Lei
Ma, Xiaojian
Huang, Biao
Physical investigation of acoustic waves induced by the oscillation and collapse of the single bubble
title Physical investigation of acoustic waves induced by the oscillation and collapse of the single bubble
title_full Physical investigation of acoustic waves induced by the oscillation and collapse of the single bubble
title_fullStr Physical investigation of acoustic waves induced by the oscillation and collapse of the single bubble
title_full_unstemmed Physical investigation of acoustic waves induced by the oscillation and collapse of the single bubble
title_short Physical investigation of acoustic waves induced by the oscillation and collapse of the single bubble
title_sort physical investigation of acoustic waves induced by the oscillation and collapse of the single bubble
topic Original Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7803823/
https://www.ncbi.nlm.nih.gov/pubmed/33421930
http://dx.doi.org/10.1016/j.ultsonch.2020.105440
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