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A numerical study of acoustic scattering by Janus spheres

Hawkins, Stuart C. and Rother, Tom and Wauer, Jochen (2020) A numerical study of acoustic scattering by Janus spheres. Journal of the Acoustical Society of America, pp. 4097-4105. Acoustical Society of America. DOI: 10.1121/10.0001472 ISSN 0001-4966

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Official URL: https://doi.org/10.1121/10.0001472

Abstract

Recently Janus particles have become important in several technological fields because they have interesting properties compared with homogeneous particles. The interaction of Janus particles with sound waves is of particular interest for diagnostic purposes, and also in applications in micro- and nanotechnology. In this paper the authors demonstrate that a method of fundamental solution combined with a T-matrix that is computed from far-field information can be applied with benefit to analyse the scattering of sound waves by a particular type of Janus sphere. Moreover, it is shown that this method converges faster than the conventional T-matrix method introduced by Waterman [(1969). J. Acoust. Soc. Am. 45, 1417–1429]. This is of special importance if orientation averaged scattering quantities are required, or if multiple scattering processes on Janus spheres are considered. This method is used to demonstrate the interesting phenomenon of an enhanced side scattering intensity that is larger than the forward scattering intensity, and that this effect can be strengthened using a particular configuration of two identical Janus spheres. Finally, the authors discuss a useful approximation that can be readily applied for two or more Janus spheres.

Item URL in elib:https://elib.dlr.de/135388/
Document Type:Article
Title:A numerical study of acoustic scattering by Janus spheres
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hawkins, Stuart C.Department of Mathematics and Statistics, Macquarie UniversityUNSPECIFIED
Rother, TomTom.Rother (at) dlr.deUNSPECIFIED
Wauer, JochenHochschule NeubrandenburgUNSPECIFIED
Date:June 2020
Journal or Publication Title:Journal of the Acoustical Society of America
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1121/10.0001472
Page Range:pp. 4097-4105
Publisher:Acoustical Society of America
ISSN:0001-4966
Status:Published
Keywords:Sound scattering, Janus spheres T-Matrix, multiple scattering, method of fundamental solution
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Neustrelitz , Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Rother, Dr.rer.nat. Tom
Deposited On:26 Jun 2020 10:49
Last Modified:26 Jun 2020 10:49

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