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Acoustical Absorption and Scattering Cross Sections of Spherical Bubble Clouds

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Title Acoustical Absorption and Scattering Cross Sections of Spherical Bubble Clouds
 
Creator d'Agostino, Luca
Brennen, Christopher E.
 
Subject Caltech Library Services
 
Description The present work investigates the acoustical absorption and scattering cross sections of spherical bubble clouds subject to harmonic farfield pressure excitation. Bubble dynamics effects and energy dissipation due to viscosity, heat transfer, liquid compressibility, and relative motion of the two phases are included. The equations of motion for the average flow and for the bubble radius are linearized and a closed-form solution is obtained. Due to the presence of natural oscillatory modes and frequencies, the acoustical cross sections of the cloud are very different from those of each individual bubble in the cloud, as well as from the acoustical cross sections of a single large bubble with the same volume of vapor and gas. In general, the acoustical properties of any give volume of the dispersed phase depend strongly on the degree of dispersion because of the complex interactions of the dynamics of the bubbles with the whole flow.
 
Date 1988-12
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://authors.library.caltech.edu/86/1/DAG087.pdf
d'Agostino, Luca and Brennen, Christopher E. (1988) Acoustical Absorption and Scattering Cross Sections of Spherical Bubble Clouds. Journal of the Acoustical Society of America, 84 (6). pp. 2126-2134. ISSN 0001-4966. http://resolver.caltech.edu/CaltechAUTHORS:DAGjasa88 <http://resolver.caltech.edu/CaltechAUTHORS:DAGjasa88>
 
Relation http://resolver.caltech.edu/CaltechAUTHORS:DAGjasa88
http://authors.library.caltech.edu/86/