3D printed photoacoustic shockwave transducer for cavitation research

In this thesis we investigate a flexible ultrasound emitter whose working principle is based on photoacoustics and is manufactured with a 3D printer. The laser generated photoacoustic waves is focused thereby achieving several hundred bars of positive pressure in water. Previous designs employed con...

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Main Author: Chan, Weiwei
Other Authors: Law Wing-Keung, Adrian
Format: Theses and Dissertations
Language:English
Published: 2018
Subjects:
Online Access:http://hdl.handle.net/10356/73252
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-732522020-11-13T04:26:48Z 3D printed photoacoustic shockwave transducer for cavitation research Chan, Weiwei Law Wing-Keung, Adrian Interdisciplinary Graduate School (IGS) Nanyang Environment and Water Research Institute Thomas Hies Claus-Dieter Ohl DRNTU::Engineering::Mechanical engineering In this thesis we investigate a flexible ultrasound emitter whose working principle is based on photoacoustics and is manufactured with a 3D printer. The laser generated photoacoustic waves is focused thereby achieving several hundred bars of positive pressure in water. Previous designs employed concave glass substrates decorated with catalytically grown carbon nanotubes. Here, we show that arbitrarily shaped surfaces made of polymers and printed with 3D printers allow the generation of waveforms with complex temporal and spatial shape. For optimization of the acoustic performance several materials are tested. Detailed high-frequency pressure measurements are supported with shadowgraphy images and simulations of the wave. Applications of the new transducer are shown in sample experiments demonstrating shockwave--bubble interactions, interfacial cavitation and jets from a concave gas-water interface. Doctor of Philosophy (IGS) 2018-02-01T02:15:42Z 2018-02-01T02:15:42Z 2018 Thesis Chan, W. (2018). 3D printed photoacoustic shockwave transducer for cavitation research. Doctoral thesis, Nanyang Technological University, Singapore. http://hdl.handle.net/10356/73252 10.32657/10356/73252 en 104 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 DRNTU::Engineering::Mechanical engineering
spellingShingle DRNTU::Engineering::Mechanical engineering
Chan, Weiwei
3D printed photoacoustic shockwave transducer for cavitation research
description In this thesis we investigate a flexible ultrasound emitter whose working principle is based on photoacoustics and is manufactured with a 3D printer. The laser generated photoacoustic waves is focused thereby achieving several hundred bars of positive pressure in water. Previous designs employed concave glass substrates decorated with catalytically grown carbon nanotubes. Here, we show that arbitrarily shaped surfaces made of polymers and printed with 3D printers allow the generation of waveforms with complex temporal and spatial shape. For optimization of the acoustic performance several materials are tested. Detailed high-frequency pressure measurements are supported with shadowgraphy images and simulations of the wave. Applications of the new transducer are shown in sample experiments demonstrating shockwave--bubble interactions, interfacial cavitation and jets from a concave gas-water interface.
author2 Law Wing-Keung, Adrian
author_facet Law Wing-Keung, Adrian
Chan, Weiwei
format Theses and Dissertations
author Chan, Weiwei
author_sort Chan, Weiwei
title 3D printed photoacoustic shockwave transducer for cavitation research
title_short 3D printed photoacoustic shockwave transducer for cavitation research
title_full 3D printed photoacoustic shockwave transducer for cavitation research
title_fullStr 3D printed photoacoustic shockwave transducer for cavitation research
title_full_unstemmed 3D printed photoacoustic shockwave transducer for cavitation research
title_sort 3d printed photoacoustic shockwave transducer for cavitation research
publishDate 2018
url http://hdl.handle.net/10356/73252
_version_ 1688665688106860544