eprintid: 1462687
rev_number: 32
eprint_status: archive
userid: 608
dir: disk0/01/46/26/87
datestamp: 2015-02-26 22:10:37
lastmod: 2021-09-24 22:03:22
status_changed: 2017-03-30 09:57:13
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Alles, EJ
creators_name: Van Dongen, KWA
title: Perfectly matched layers for frequency-domain integral equation acoustic scattering problems
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F42
keywords: Reflection, Integral equations, Equations, Mathematical model, Acoustic scattering, Acoustics
note: Copyright © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
abstract: Simulations of acoustic wavefields in inhomogeneous media are always performed on finite numerical domains. If contrasts actually extend over the domain boundaries of the numerical volume, unwanted, non-physical reflections from the boundaries will occur. One technique to suppress these reflections is to attenuate them in a locally reflectionless absorbing boundary layer enclosing the spatial computational domain, a perfectly matched layer (PML). This technique is commonly applied in time-domain simulation methods like finite element methods or finite-difference time-domain, but has not been applied to the integral equation method. In this paper, a PML formulation for the three-dimensional frequency-domain integral-equation-based acoustic scattering problem is derived. Three-dimensional acoustic scattering configurations are used to test the PML formulation. The results demonstrate that strong attenuation (a factor of 200 in amplitude) of the scattered pressure field is achieved for thin layers with a thickness of less than a wavelength, and that the PMLs themselves are virtually reflectionless. In addition, it is shown that the integral equation method, both with and without PMLs, accurately reproduces pressure fields by comparing the obtained results with analytical solutions.
date: 2011-05
official_url: http://dx.doi.org/10.1109/TUFFC.2011.1908
vfaculties: VENG
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_source: crossref
elements_id: 1016477
doi: 10.1109/TUFFC.2011.1908
lyricists_name: Alles, Erwin
lyricists_id: EJALL00
full_text_status: public
publication: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
volume: 58
number: 5
pagerange: 1077-1086
issn: 0885-3010
citation:        Alles, EJ;    Van Dongen, KWA;      (2011)    Perfectly matched layers for frequency-domain integral equation acoustic scattering problems.                   IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control , 58  (5)   pp. 1077-1086.    10.1109/TUFFC.2011.1908 <https://doi.org/10.1109/TUFFC.2011.1908>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1462687/1/Alles_2%20column%20final.pdf