Synthetic jet generation by high-frequency cavitation
Cavitation bubbles are nucleated at a high repetition rate in water by delivering a pulsed laser through a fibre optic. Continuous high-frequency cavitation drives a stream away from the fibre tip. Using high-speed photography and particle image velocimetry, the stream is characterised as a syntheti...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/87074 http://hdl.handle.net/10220/44291 |
| _version_ | 1826120291899670528 |
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| author | Mohammadzadeh, Milad Gonzalez-Avila, Silvestre Roberto Liu, Kun Wang, Qi Jie Ohl, Claus-Dieter |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Mohammadzadeh, Milad Gonzalez-Avila, Silvestre Roberto Liu, Kun Wang, Qi Jie Ohl, Claus-Dieter |
| author_sort | Mohammadzadeh, Milad |
| collection | NTU |
| description | Cavitation bubbles are nucleated at a high repetition rate in water by delivering a pulsed laser through a fibre optic. Continuous high-frequency cavitation drives a stream away from the fibre tip. Using high-speed photography and particle image velocimetry, the stream is characterised as a synthetic jet, generated by trains of vortices induced by non-spherical bubble collapse. At low laser power, the bubbles collapse before the arrival of a subsequent laser pulse. Yet, by increasing the laser power, a system of bubbles is formed which leads to complex bubble–bubble interactions. The synthetic jet is observed regardless of the bubble formation regime, demonstrating the stability of the phenomenon. Synthetic jet generation by repetitive bubble collapse extends the well-studied acoustic streaming from small-amplitude bubble oscillations. |
| first_indexed | 2024-10-01T05:13:47Z |
| format | Journal Article |
| id | ntu-10356/87074 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:13:47Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/870742023-02-28T19:28:50Z Synthetic jet generation by high-frequency cavitation Mohammadzadeh, Milad Gonzalez-Avila, Silvestre Roberto Liu, Kun Wang, Qi Jie Ohl, Claus-Dieter School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences Bubble Dynamics Cavitation Cavitation bubbles are nucleated at a high repetition rate in water by delivering a pulsed laser through a fibre optic. Continuous high-frequency cavitation drives a stream away from the fibre tip. Using high-speed photography and particle image velocimetry, the stream is characterised as a synthetic jet, generated by trains of vortices induced by non-spherical bubble collapse. At low laser power, the bubbles collapse before the arrival of a subsequent laser pulse. Yet, by increasing the laser power, a system of bubbles is formed which leads to complex bubble–bubble interactions. The synthetic jet is observed regardless of the bubble formation regime, demonstrating the stability of the phenomenon. Synthetic jet generation by repetitive bubble collapse extends the well-studied acoustic streaming from small-amplitude bubble oscillations. Accepted version 2018-01-10T01:47:26Z 2019-12-06T16:34:35Z 2018-01-10T01:47:26Z 2019-12-06T16:34:35Z 2017 Journal Article Mohammadzadeh, M., Gonzalez-Avila, S. R., Liu, K., Wang, Q. J., & Ohl, C.-D. (2017). Synthetic jet generation by high-frequency cavitation. Journal of Fluid Mechanics, 823, R3-. 0022-1120 https://hdl.handle.net/10356/87074 http://hdl.handle.net/10220/44291 10.1017/jfm.2017.358 en Journal of Fluid Mechanics © 2017 Cambridge University Press (CUP). This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Fluid Mechanics, Cambridge University Press. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1017/jfm.2017.358]. 11 p. application/pdf |
| spellingShingle | Bubble Dynamics Cavitation Mohammadzadeh, Milad Gonzalez-Avila, Silvestre Roberto Liu, Kun Wang, Qi Jie Ohl, Claus-Dieter Synthetic jet generation by high-frequency cavitation |
| title | Synthetic jet generation by high-frequency cavitation |
| title_full | Synthetic jet generation by high-frequency cavitation |
| title_fullStr | Synthetic jet generation by high-frequency cavitation |
| title_full_unstemmed | Synthetic jet generation by high-frequency cavitation |
| title_short | Synthetic jet generation by high-frequency cavitation |
| title_sort | synthetic jet generation by high frequency cavitation |
| topic | Bubble Dynamics Cavitation |
| url | https://hdl.handle.net/10356/87074 http://hdl.handle.net/10220/44291 |
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