Results 261 to 270 of about 7,237 (288)

An investigation of the collective oscillations of a bubble cloud

The Journal of the Acoustical Society of America, 1991
It is well known that ocean ambient noise levels in the frequency range from a few hundred hertz to several tens of kilohertz are well correlated with wind speed. A physical mechanism that could account for some of this sound generation is the production of bubble clouds by breaking waves. A simple laboratory study of the sound generated by a column of
S. W. Yoon, L. A. Crum, A. Prosperetti, N. Q. Lu   +3 more
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Dynamical Interactions in a Multi-Bubble Cloud

Journal of Fluids Engineering, 1992
Results of studies on the dynamics of “clouds” of bubbles via both an analytical technique using asymptotic expansions, and via numerical simulation using a three-dimensional boundary element technique (BEM) are reported. The asymptotic method relies on the assumption that the characteristic bubble size is much smaller than the characteristic inter ...
Georges L. Chahine, Ramani Duraiswami
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The Horizontal Structure and Distribution of Bubble Clouds

1988
We review and extend the knowledge of the shape of bubble clouds and describe the factors which lead to their uneven distribution in space and time in local region of the ocean. The information is based on observations using upward-pointing moored, or bottom-mounted, sonars and towed sonars. Side-scan sonar in particular provides much information about
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Numerical study on stress in a solid wall caused by the collapse of a cavitation bubble cloud in hydraulic fluid

International Journal of Multiphase Flow, 2022
Kohei Okita, Shu Takagi
exaly  

HII Bubbles and Shocks in Molecular Clouds

1982
Supersonic gas velocities and large density gradients are observed in compact HII regions. Possible causes of such flows are examined analytically. It is shown that density gradients in either the HII region or the exterior molecular cloud can naturally give supersonic gas speeds.
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BUBBLE CLOUDS

Weather, 1983
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Investigation of Bubble Clouds in a Cavitating Jet

2016
It is possible for cloud cavitation to severely damage a material’s surface. In this study, the unsteady behavior of cloud cavitation in a high-speed water jet is investigated by experimental observation and numerical simulations. Using a high-speed video camera with a frame rate of approximately \(5\times 10^5\) fps, it is found that high-pressure ...
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AN IMAGE PROCESSING TOOL FOR THE ANALYSIS OF ACOUSTIC BUBBLE CLOUD DYNAMICS

Journal of Flow Visualization and Image Processing, 2021
Amir Hossein Foruzan, Abazar Hajnorouzi
exaly  

Cavitation inception pressure and bubble cloud formation due to the backscattering of high-intensity focused ultrasound from a laser-induced bubble

Journal of the Acoustical Society of America, 2020
Toshiyuki Ogasawara, Hiroyuki Takahira
exaly  

Artificial bubble cloud targets

Sea Surface Sound '94, 1996
Paul A. Hwang, Ronald A. Roy, Lawrence A. Crum   +2 more
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