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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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 |
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DRNTU::Engineering::Mechanical engineering Chan, Weiwei 3D printed photoacoustic shockwave transducer for cavitation research |
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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. |
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Law Wing-Keung, Adrian |
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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 |
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3D printed photoacoustic shockwave transducer for cavitation research |
title_sort |
3d printed photoacoustic shockwave transducer for cavitation research |
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2018 |
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http://hdl.handle.net/10356/73252 |
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1688665688106860544 |