Visco-inertial absorption in dilute suspensions of irregular particles
Visco-inertial absorption in dilute suspensions of irregular particles
The presence of mineral particles in suspension results in excess acoustic attenuation which may be significant for high-frequency (tens to hundreds of kilohertz) sonar systems operating in shallow water. Laboratory measurements of absorption at 50-150 kHz in dilute suspensions of spherical, highly non-spherical and natural marine sediment particles are presented and compared with predictions of models for visco-inertial absorption by spherical and spheroidal particles. The methods are validated by the good agreement obtained between the predictions of the spherical model and measurements made with glass spheres. Good agreement is obtained between measurements with plate-like kaolin particles and the predictions of the model for oblate spheroids. Both the spherical and spheroidal models give the approximate magnitude of the attenuation in suspensions of natural marine sediment particles over the frequency range of the measurements.
acoustics, ultrasound, absorption, suspension, marine sediment
2153-2167
Richards, S.D.
5c0cc1ad-1f1d-4bef-9ff5-6468a51a5b0b
Leighton, T.G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Brown, N.R.
b5a5dac4-a928-42a4-b472-e7b6cac6357b
2003
Richards, S.D.
5c0cc1ad-1f1d-4bef-9ff5-6468a51a5b0b
Leighton, T.G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Brown, N.R.
b5a5dac4-a928-42a4-b472-e7b6cac6357b
Richards, S.D., Leighton, T.G. and Brown, N.R.
(2003)
Visco-inertial absorption in dilute suspensions of irregular particles.
Proceedings of the Royal Society A, 459 (2037), .
(doi:10.1098/rspa.2003.1126).
Abstract
The presence of mineral particles in suspension results in excess acoustic attenuation which may be significant for high-frequency (tens to hundreds of kilohertz) sonar systems operating in shallow water. Laboratory measurements of absorption at 50-150 kHz in dilute suspensions of spherical, highly non-spherical and natural marine sediment particles are presented and compared with predictions of models for visco-inertial absorption by spherical and spheroidal particles. The methods are validated by the good agreement obtained between the predictions of the spherical model and measurements made with glass spheres. Good agreement is obtained between measurements with plate-like kaolin particles and the predictions of the model for oblate spheroids. Both the spherical and spheroidal models give the approximate magnitude of the attenuation in suspensions of natural marine sediment particles over the frequency range of the measurements.
This record has no associated files available for download.
More information
Published date: 2003
Keywords:
acoustics, ultrasound, absorption, suspension, marine sediment
Identifiers
Local EPrints ID: 10361
URI: http://eprints.soton.ac.uk/id/eprint/10361
ISSN: 1364-5021
PURE UUID: 18c85d92-92b1-4c49-985f-ba1404bdee06
Catalogue record
Date deposited: 10 Jun 2005
Last modified: 16 Mar 2024 02:44
Export record
Altmetrics
Contributors
Author:
S.D. Richards
Author:
N.R. Brown
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
