Acoustic Frequency For Bubble Size Correlation
Using Acoustic Emissions
Author(s)
S. Husin, A. Addali & D. Mba
Abstract
In this study, a correlation between acoustic frequency and the bubble size of a
single bubble burst at the free surface has been demonstrated. Bubble burst was
used as it is an acoustically noisy process, independent parameter and potential
source of AE in a liquid medium. An AE transducer was used to record sound as
the bubble bursts at the free surface. The acoustic data were then processed to
extract the bursting frequency associated with the bubble size. The frequency of
the acoustic bursting has been shown to be related to the size of the bubble. The
effects of liquid viscosity on acoustically determined bubble size has also been
demonstrated.
Keywords: Acoustic Emission (AE), gas bubble, gas bubble burst, frequency
spectra.
1 Introduction
Bubble burst characteristics-acoustic frequency can be used as a basis for
interpreting bubble properties, particularly bubble size. Sound pressure detection
from a single bubble burst at free surface is an important parameter for
estimating bubble and liquid properties where the process is independent from
external forces. Bubble bursting by its nature at a free surface is deemed useful
for empirical parameter which is more accurate and detectable with an AE
transducer. However, study of the acoustic frequency of a single bubble burst at
free surface using AE technology is never attempted for bubble properties’
determination, particularly for bubble sizing. This proposed technique is passive,
can be employed either intrusively or non-invasively and is a rapid measurement
technique. Furthermore, the robust acoustic transducer is more practical in
Keywords
Acoustic Emission (AE), gas bubble, gas bubble burst, frequency
spectra.
Related Book
Other papers in this volume
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