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Sound propagation and scattering in bubbly liquids.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Sound propagation and scattering in bubbly liquids./
作者:	Wilson, Preston Scot.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2002,
面頁冊數:	313 p.
附註:	Source: Dissertations Abstracts International, Volume: 63-10, Section: B.
Contained By:	Dissertations Abstracts International63-10B.
標題:	Fluid dynamics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3034786
ISBN:	9780493477169

Sound propagation and scattering in bubbly liquids.
Wilson, Preston Scot.

Sound propagation and scattering in bubbly liquids. - Ann Arbor : ProQuest Dissertations & Theses, 2002 - 313 p.

Source: Dissertations Abstracts International, Volume: 63-10, Section: B.

Thesis (Ph.D.)--Boston University, 2002.

This item must not be sold to any third party vendors.

In the ocean, natural and artificial processes generate clouds of bubbles which scatter and attenuate sound. Measurements have shown that at the individual bubble resonance frequency, sound propagation in this medium is highly attenuated and dispersive. Theory to explain this behavior exists in the literature, and is adequate away from resonance. However, due to excessive attenuation near resonance, little experimental data exists for comparison. An impedance tube was developed specifically for exploring this regime. Using the instrument, unique phase speed and attenuation measurements were made for void fractions ranging from 6.2 x 10−5 to 2.7 x 10−3 and bubble sizes centered around 0.62 mm in radius. Improved measurement speed, accuracy and precision is possible with the new instrument, and both instantaneous and time-averaged measurements were obtained. Behavior at resonance was observed to be sensitive to the bubble population statistics and agreed with existing theory, within the uncertainty of the bubble population parameters. Scattering from acoustically compact bubble clouds can be predicted from classical scattering theory by using an effective medium description of the bubbly fluid interior. Experimental verification was previously obtained up to the lowest resonance frequency. A novel bubble production technique has been employed to obtain unique scattering measurements with a bubbly-liquid-filled latex tube in a large indoor tank. The effective scattering model described these measurements up to three times the lowest resonance frequency of the structure.

ISBN: 9780493477169Subjects--Topical Terms:

545210
Fluid dynamics.
Subjects--Index Terms:

Bubbly liquids

Sound propagation and scattering in bubbly liquids.
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100 1 $a Wilson, Preston Scot. $3 3687090
245 1 0 $a Sound propagation and scattering in bubbly liquids.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2002
300 $a 313 p.
500 $a Source: Dissertations Abstracts International, Volume: 63-10, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Roy, Ronald A.
502 $a Thesis (Ph.D.)--Boston University, 2002.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a In the ocean, natural and artificial processes generate clouds of bubbles which scatter and attenuate sound. Measurements have shown that at the individual bubble resonance frequency, sound propagation in this medium is highly attenuated and dispersive. Theory to explain this behavior exists in the literature, and is adequate away from resonance. However, due to excessive attenuation near resonance, little experimental data exists for comparison. An impedance tube was developed specifically for exploring this regime. Using the instrument, unique phase speed and attenuation measurements were made for void fractions ranging from 6.2 x 10−5 to 2.7 x 10−3 and bubble sizes centered around 0.62 mm in radius. Improved measurement speed, accuracy and precision is possible with the new instrument, and both instantaneous and time-averaged measurements were obtained. Behavior at resonance was observed to be sensitive to the bubble population statistics and agreed with existing theory, within the uncertainty of the bubble population parameters. Scattering from acoustically compact bubble clouds can be predicted from classical scattering theory by using an effective medium description of the bubbly fluid interior. Experimental verification was previously obtained up to the lowest resonance frequency. A novel bubble production technique has been employed to obtain unique scattering measurements with a bubbly-liquid-filled latex tube in a large indoor tank. The effective scattering model described these measurements up to three times the lowest resonance frequency of the structure.
590 $a School code: 0017.
650 4 $a Fluid dynamics. $3 545210
650 4 $a Gases. $3 559387
650 4 $a Acoustics. $3 879105
650 4 $a Mechanical engineering. $3 649730
650 4 $a Plasma physics. $3 3175417
653 $a Bubbly liquids
653 $a Scattering
653 $a Sound propagation
653 $a Two-phase flow
653 $a Underwater acoustics
690 $a 0759
690 $a 0986
690 $a 0548
710 2 $a Boston University. $3 1017454
773 0 $t Dissertations Abstracts International $g 63-10B.
790 $a 0017
791 $a Ph.D.
792 $a 2002
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3034786