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Atomization and Sprays
Fator do impacto: 1.262 FI de cinco anos: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Imprimir: 1044-5110
ISSN On-line: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2013007139
pages 475-485

HIGH RESOLUTION OPTICAL EXPERIMENTAL TECHNIQUE FOR COMPUTING PULSED LASER-INDUCED CAVITATION BUBBLE DYNAMICS IN A SINGLE SHOT

Luis Felipe Devia-Cruz
Center for Scientific Research and Higher Education at Ensenada (CICESE)
Francisco Perez-Gutierrez
Facultad de Ingenieriıa, Universidad Autonoma de San Luis Potosi
Daniel Garcia-Casillas
Department of Mechanical Engineering, University of California, Riverside, California, USA
Guillermo Aguilar
Department of Mechanical Engineering, University of California-Riverside, Riverside, California 92507, USA
Santiago Camacho-Lopez
Departamento de Optica, Centro de Investigacion Cientiıfica y de Educacion Superior de Ensenada, Mexico
Darren Banks
Department of Mechanical Engineering, University of California-Riverside, Riverside, California 92521, USA

RESUMO

The experiments conducted in this study consisted of a series of plasma generated cavitation bubbles in water, obtained by focusing a 532-nm Q-switched Nd:YAG nanosecond-pulsed laser. For the purpose of detection of such cavitation bubbles, a novel direct light transmission technique is used, referred to as spatial transmission modulation (STM), consisting of a nearly collimated beam of light passing through the sample at the point where the cavitation bubble is formed. The presence of the cavitation bubble modifies the direct light transmission, which is detected with a photodiode located at the opposite end. This is observed as an electrical signal response with an oscilloscope. A 1-megapixel high-speed video camera simultaneously records the cavitation event. The video was taken in an orthogonal direction with respect to the STM optical axis and was triggered simultaneously with an oscilloscope using the electronic synchronization signal from the pulsed laser. Data from the highspeed video was used to show that a computational spatial energetic analysis from the continuous laser probe beam is a valid method to directly obtain the cavitation bubble evolution from a single shot pulse.

Palavras-chave: cavitation, pulsed laser, plasma

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