Interactions of bubbles in acoustic Lichtenberg figure
The evolution of acoustic Lichtenberg figure (ALF) in ultrasound fields is studied using high-speed photography. It is observed that bubbles travel along the branch to the aggregation region of an ALF, promoting the possibility of large bubble or small cluster formation. Large bubbles move away from...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-06-01
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| Series: | Ultrasonics Sonochemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S135041772200150X |
| _version_ | 1811245159125352448 |
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| author | Fan Li Xianmei Zhang Hua Tian Jing Hu Shi Chen Runyang Mo Chenghui Wang Jianzhong Guo |
| author_facet | Fan Li Xianmei Zhang Hua Tian Jing Hu Shi Chen Runyang Mo Chenghui Wang Jianzhong Guo |
| author_sort | Fan Li |
| collection | DOAJ |
| description | The evolution of acoustic Lichtenberg figure (ALF) in ultrasound fields is studied using high-speed photography. It is observed that bubbles travel along the branch to the aggregation region of an ALF, promoting the possibility of large bubble or small cluster formation. Large bubbles move away from the aggregation region while surrounding bubbles are attracted into this structure, and a bubble transportation cycle arises in the cavitation field. A simplified model consisting of a spherical cluster and a chain of bubbles is developed to explain this phenomenon. The interaction of the two units is analyzed using a modified expression for the secondary Bjerknes force in this system. The model reveals that clusters can attract bubbles on the chain within a distance of 2 mm, leading to a bubble transportation process from the chain to the bubble cluster. Many factors can affect this process, including the acoustic pressure, frequency, bubble density, and separation distance. The larger the bubble in the cluster, the broader the attraction region. Therefore, the presence of large bubbles might enhance the process in this system. Local disturbances in bubble density could destroy the ALF structure. The predictions of the model are in good agreement with the experimental phenomena. |
| first_indexed | 2024-04-12T14:37:05Z |
| format | Article |
| id | doaj.art-4b0bf16fca404e09b20d7b9ae12fec5b |
| institution | Directory Open Access Journal |
| issn | 1350-4177 |
| language | English |
| last_indexed | 2024-04-12T14:37:05Z |
| publishDate | 2022-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ultrasonics Sonochemistry |
| spelling | doaj.art-4b0bf16fca404e09b20d7b9ae12fec5b2022-12-22T03:29:04ZengElsevierUltrasonics Sonochemistry1350-41772022-06-0187106057Interactions of bubbles in acoustic Lichtenberg figureFan Li0Xianmei Zhang1Hua Tian2Jing Hu3Shi Chen4Runyang Mo5Chenghui Wang6Jianzhong Guo7Institute of Shaanxi Key Laboratory of Ultrasonics, Shaanxi Normal University, Xi’an 710119, ChinaInstitute of Shaanxi Key Laboratory of Ultrasonics, Shaanxi Normal University, Xi’an 710119, ChinaInstitute of Shaanxi Key Laboratory of Ultrasonics, Shaanxi Normal University, Xi’an 710119, ChinaInstitute of Shaanxi Key Laboratory of Ultrasonics, Shaanxi Normal University, Xi’an 710119, ChinaInstitute of Shaanxi Key Laboratory of Ultrasonics, Shaanxi Normal University, Xi’an 710119, ChinaInstitute of Shaanxi Key Laboratory of Ultrasonics, Shaanxi Normal University, Xi’an 710119, ChinaCorresponding authors.; Institute of Shaanxi Key Laboratory of Ultrasonics, Shaanxi Normal University, Xi’an 710119, ChinaCorresponding authors.; Institute of Shaanxi Key Laboratory of Ultrasonics, Shaanxi Normal University, Xi’an 710119, ChinaThe evolution of acoustic Lichtenberg figure (ALF) in ultrasound fields is studied using high-speed photography. It is observed that bubbles travel along the branch to the aggregation region of an ALF, promoting the possibility of large bubble or small cluster formation. Large bubbles move away from the aggregation region while surrounding bubbles are attracted into this structure, and a bubble transportation cycle arises in the cavitation field. A simplified model consisting of a spherical cluster and a chain of bubbles is developed to explain this phenomenon. The interaction of the two units is analyzed using a modified expression for the secondary Bjerknes force in this system. The model reveals that clusters can attract bubbles on the chain within a distance of 2 mm, leading to a bubble transportation process from the chain to the bubble cluster. Many factors can affect this process, including the acoustic pressure, frequency, bubble density, and separation distance. The larger the bubble in the cluster, the broader the attraction region. Therefore, the presence of large bubbles might enhance the process in this system. Local disturbances in bubble density could destroy the ALF structure. The predictions of the model are in good agreement with the experimental phenomena.http://www.sciencedirect.com/science/article/pii/S135041772200150XAcoustic Lichtenberg figure (ALF)Bubble transportation processSecondary Bjerknes force |
| spellingShingle | Fan Li Xianmei Zhang Hua Tian Jing Hu Shi Chen Runyang Mo Chenghui Wang Jianzhong Guo Interactions of bubbles in acoustic Lichtenberg figure Ultrasonics Sonochemistry Acoustic Lichtenberg figure (ALF) Bubble transportation process Secondary Bjerknes force |
| title | Interactions of bubbles in acoustic Lichtenberg figure |
| title_full | Interactions of bubbles in acoustic Lichtenberg figure |
| title_fullStr | Interactions of bubbles in acoustic Lichtenberg figure |
| title_full_unstemmed | Interactions of bubbles in acoustic Lichtenberg figure |
| title_short | Interactions of bubbles in acoustic Lichtenberg figure |
| title_sort | interactions of bubbles in acoustic lichtenberg figure |
| topic | Acoustic Lichtenberg figure (ALF) Bubble transportation process Secondary Bjerknes force |
| url | http://www.sciencedirect.com/science/article/pii/S135041772200150X |
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