Measurement of bubble properties using a multi-frequency sound field
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Authors
Perron, Robert A.
Subjects
Bubble Resonance Frequency
Nonlinear Bubble Dynamics
Rise-Time Bubble Sizing
Dual Frequency
Rectified Diffusion Damping
Nonlinear Bubble Dynamics
Rise-Time Bubble Sizing
Dual Frequency
Rectified Diffusion Damping
Advisors
Atchley, Anthony A.
Date of Issue
1989-06
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
en_US
Abstract
An apparatus was designed, constructed, and tested to measure properties of single bubbles in a fluid by use of a multi-frequency sound field. The theoretical background on the dual frequency method for obtaining bubble properties such as resonance frequency, rectified diffusion thresholds and rates, rise-time sizing, and damping coefficients are discussed. Specifications and design of the device are presented. Sizes of single air bubbles in water determined from dual frequency methods are compared to rise-time sizing for radii from 30 to 100 μ m, these two methods are shown to agree within 1%. Rectified diffusion rates measured above, at, and below threshold for an initial bubble radius of 50 μ m in air-saturated water over a period of 700 seconds were measured and the results demonstrate the reliability of the system. The potential of this device to measure damping coefficient is discussed.
Type
Thesis
Description
Series/Report No
Department
Organization
Identifiers
NPS Report Number
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Format
52 p.