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...

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Main Authors: Mohammadzadeh, Milad, Gonzalez-Avila, Silvestre Roberto, Liu, Kun, Wang, Qi Jie, Ohl, Claus-Dieter
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2018
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Online Access:https://hdl.handle.net/10356/87074
http://hdl.handle.net/10220/44291
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.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
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Bubble Dynamics
Cavitation
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
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.
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
format Article
author Mohammadzadeh, Milad
Gonzalez-Avila, Silvestre Roberto
Liu, Kun
Wang, Qi Jie
Ohl, Claus-Dieter
author_sort Mohammadzadeh, Milad
title Synthetic jet generation by high-frequency cavitation
title_short 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_sort synthetic jet generation by high-frequency cavitation
publishDate 2018
url https://hdl.handle.net/10356/87074
http://hdl.handle.net/10220/44291
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