Journal ArticleDOI
Damping Constants of Pulsating Bubbles
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In this article, the damping constants of resonant bubbles are extended to the off-resonance case and it is shown that thermal damping is important for bubbles driven below resonance, and radiation damping for those above resonance.Abstract:
Results obtained by Devin [J. Acoust. Soc. Amer. 31, 1654–1667 (1959)] for the damping constants of resonant bubbles are extended to the off‐resonance case. Calculated results show for the range of conditions considered that thermal damping is important for bubbles driven below resonance, and radiation damping is important for those above resonance.read more
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Journal ArticleDOI
Using seismic crosswell surveys to determine the aperture of partially water-saturated fractures
Bruno Kaelin,Lane R. Johnson +1 more
TL;DR: In this article, an air injection experiment in a shallow fractured limestone at Conoco's borehole test facility near Newkirk, Oklahoma, has shown large effects on amplitude but small effects on the travel time of the transmitted seismic waves.
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Radiation damping of, and scattering from, an arbitrarily shaped bubble.
TL;DR: The work by Strasberg on small volume oscillations of bubbles with arbitrary shape is extended to include the effects of radiation damping, and an expression for the far-field scattering amplitude from an arbitrarily shaped bubble is given in terms of a quantity that is mathematically equivalent to the electrostatic capacitance of the bubble shape.
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The quality factor of oscillating bubbles as an indication of gas content with particular reference to methane
TL;DR: In this paper, the quality factor Q of oscillating bubbles can be used to distinguish methane bubbles from the air bubbles, which are ubiquitous near the ocean surface, and possible acoustic techniques for detecting and sizing methane bubbles in the ocean are discussed briefly.
Journal ArticleDOI
Improvement of micro-bubble sizing using multi-harmonic excitations under the transducer bandwidth constraint
TL;DR: In this paper, a microbubble sizing method based on the use of the odd harmonics of square-like excitations is presented, which can be used to enlarge the range of micro bubble detection and sizing.