Acoustic scattering by a penetrable spheroid

Kotsis, AD; Roumeliotis, JA

dc.contributor.author	Kotsis, AD	en
dc.contributor.author	Roumeliotis, JA	en
dc.date.accessioned	2014-03-01T01:27:49Z
dc.date.available	2014-03-01T01:27:49Z
dc.date.issued	2008	en
dc.identifier.issn	1063-7710	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18594
dc.subject	Acoustic Scattering	en
dc.subject	Acoustic Waves	en
dc.subject	Cross Section	en
dc.subject	Perturbation Method	en
dc.subject.classification	Acoustics	en
dc.subject.other	Boundary conditions	en
dc.subject.other	Numerical methods	en
dc.subject.other	Parameter estimation	en
dc.subject.other	Wave functions	en
dc.subject.other	Expansion coefficients	en
dc.subject.other	Interfocal distance	en
dc.subject.other	Oblate spheroid	en
dc.subject.other	Pressure field	en
dc.subject.other	Spheroid	en
dc.subject.other	Acoustic wave scattering	en
dc.title	Acoustic scattering by a penetrable spheroid	en
heal.type	journalArticle	en
heal.identifier.primary	10.1134/S1063771008020036	en
heal.identifier.secondary	http://dx.doi.org/10.1134/S1063771008020036	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The scattering of a plane acoustic wave from a penetrable prolate or oblate spheroid is considered. Two different methods are used for the evaluation. In the first, the pressure field is expressed in terms of spheroidal wave functions. In the second, a shape perturbation method, the field is expressed in terms of spherical wave functions only, while the equation of the spheroidal boundary is given in spherical coordinates. Analytical expressions are obtained for the scattered pressure field and the various scattering cross-sections when the solution is specialized to small values of the eccentricity h = d/(2a), (h < 1), with d being the interfocal distance of the spheroid and 2a the length of its rotation axis. In this case, exact, closed-form expressions are obtained for the expansion coefficients g (2) and g (4) in the relation S(h) = S(0)[1 + g (2) h 2 + g (4) h 4 + O(h 6)] expressing the scattered field and the scattering cross-sections. Numerical results are given for various values of the parameters. © 2008 Pleiades Publishing, Ltd.	en
heal.publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER	en
heal.journalName	Acoustical Physics	en
dc.identifier.doi	10.1134/S1063771008020036	en
dc.identifier.isi	ISI:000254701800003	en
dc.identifier.volume	54	en
dc.identifier.issue	2	en
dc.identifier.spage	153	en
dc.identifier.epage	167	en