Mie scattering from a sonoluminescing air bubble in water

Lentz, William J.; Atchley, Anthony A.; Gaitan, D. Felipe

doi:10.1364/ao.34.002648

Cited by 37 publications

(14 citation statements)

References 9 publications

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“…The lower curve is for the case of 23 mm water height and the upper curve is for 76 mm height. It is seen that at 23 mm the shape of the curve is similar to that in a single-bubble experiment [13][14][15]. In this case where the measuring position is relatively near the sound source, the resonant standing wave is not necessarily established because the sound field in front of the sound source has spatial complexity and the reflected wave from the water surface is strongly dampened by the bubbles stability existing at pressureantinodes near the water surface.…”

Section: Resultsmentioning

confidence: 57%

“…The method of light scattering is often used to study the oscillation of a single cavitation bubble [13][14][15]. For multibubble oscillations, however, there were few studies except for the case of a progressive ultrasound wave using a horn type transducer examined by Negishi [16].…”

Section: Introductionmentioning

confidence: 99%

“…The waveform of scattered light, which was composed of superposition of scattered light intensity according to the scattering cross section of each bubble repeating expansion and contraction due to the acoustic cycle, was recorded with a digital oscilloscope (YOKOGAWA, DL1540C) controlled by the above computer. According to the relationship between the scattering cross section and the scattered light intensity at different size of cavitation bubbles, small bubble is relatively effective for contributing to the scattered light intensity [14,18]. Also, the size distribution of cavitation bubble effective for sonochemical reactions is restricted due to its shape instability [10,19].…”

Section: Introductionmentioning

confidence: 99%

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Spatial study on a multibubble system for sonochemistry by laser-light scattering

Tuziuti

Yasui

Iida

2005

Ultrasonics Sonochemistry

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Volumetric oscillation of multiple cavitation bubbles in an ultrasonic standing-wave field is investigated spatially through the intensity measurements of scattered light from bubbles changing the measuring position in the direction of sound propagation. When a thin light sheet finer than half of wavelength of sound is introduced into the cavitation bubbles, at an antinode of sound pressure the scattered light intensity oscillates. The peak-to-peak light intensity corresponds to the number of the bubbles which contribute to the sonochemical reaction because the radius for oscillating bubbles at pressure antinodes is restrictive in a certain range due to the shape instability and the action of Bjerknes force that expels from the antinode bubbles that are larger than the resonant size. The experimental results show that the intensity waveform of oscillating scattered light measured at the side near the sound source is similar to the waveform as seen in a single-bubble experiment. The peak-to-peak light intensity for the scattered light waveform is low at the side near the sound source where the progressive wave is dominant, while at the side near the water surface far from the sound source the intensity is relatively high and has periodic structure corresponding to the periodicity of half wavelength from the standing wave. These tendencies of high intensity near the water surface and the periodicity correspond to the periodic luminescent stripes seen in images of luminescence in an ultrasonic standing wave as reported by Hatanaka et al. [Jpn. J. Appl. Phys. 39 (2000) 2962]. The present method of light scattering is promising for evaluating spatial distribution of violently oscillating cavitation bubbles which effect sonochemical reactions.

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Section: Resultsmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatial study on a multibubble system for sonochemistry by laser-light scattering

Tuziuti

Yasui

Iida

2005

Ultrasonics Sonochemistry

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“…A determination of the fraction of potential energy that remains in the bubble at the moment of collapse is a key aspect of SL. Thus the dynamics of the collapse is critical to an understanding of SL and so various techniques [2][3][4][5][6][7][8][9][10] have been applied to the experimental determination of the bubble radius as a function of time R(t) and the response of the water.…”

mentioning

confidence: 99%

“…Various realizations of Mie scattering [3][4][5][6][7][8][9][10] in particular have proved useful in obtaining bubble parameters. Mie scattering occurs when variations in the index of refraction cause light to be scattered out of the direction of the incident beam.…”

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confidence: 99%

Comment on “Mie scattering from a sonoluminescing bubble with high spatial and temporal resolution” [Physical Review E61, 5253 (2000)]

2001

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A key parameter underlying the existence of sonoluminescence [or 'SL'] is the time relative to SL at which acoustic energy is radiated from the collapsed bubble. Light scattering is one route to this quantity. We disagree with the statement of Gompf and Pecha thathighly compressed water causes the minimum in scattered light to occur 700ps before SL-and that this effect leads to an overestimate of the bubble wall velocity. We discuss potential artifacts in their experimental arrangement and correct their description of previous experiments on Mie scattering.In sonoluminescence the first stage of energy focusing is provided by the collapse of a gas bubble surrounded by water. For example a 40KHz sound field with an amplitude of 1.35atm will cause a helium bubble with an ambient radius of 4microns to expand to a maximum radius of 29 µ . Since the bubble contains 6.7x10 9 helium atoms and is acted on by about 1atm[=P 0 ] of ambient external pressure the mechanical energy stored when the bubble is perched at its maximum radius is about 10.eV per helium atom [1].

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Angle-dependent light scattering by highly uniform colloidal rod-shaped microparticles: Experiment and simulation

Rotstein

Berges

Mitragotri

et al. 2016

J. Polym. Sci. Part B: Polym. Phys.

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While extensive theoretical work has been devoted to analyzing scattering behavior for nonspherical particles, few experimental studies of the light-scattering properties of such particles are available, largely because of the difficulty of synthesizing such particles with uniform geometries. Here we report the synthesis of highly uniform, volume-equivalent rodshaped colloidal particles prepared from their commercial spherical counterparts, on which we performed light scattering experiments as a function of scattering angle for micro rods with varying aspect ratio and volume. These results were compared to values calculated using the T-Matrix method. Good agreement with theoretical predictions was found for the experimentally measured scattering cross sections and the angular dependence of the scattering intensity. An increase in the forward scattering intensity is observed and predicted for particles with larger aspect ratios relative to their volume equivalent spheres, with only minor differences observed at both mid-range and backscattering angles. Furthermore, the light scattering results for the rod-shaped particles did not show the scattering fringes seen in scattering by the spheres, indicating that as three-dimensional symmetry is broken, the associated Lorenz-Mie resonances are strongly attenuated. This observation also was predicted by theory.

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Mie scattering from a sonoluminescing air bubble in water

Cited by 37 publications

References 9 publications

Spatial study on a multibubble system for sonochemistry by laser-light scattering

Spatial study on a multibubble system for sonochemistry by laser-light scattering

Comment on “Mie scattering from a sonoluminescing bubble with high spatial and temporal resolution” [Physical Review E61, 5253 (2000)]

Angle-dependent light scattering by highly uniform colloidal rod-shaped microparticles: Experiment and simulation

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