Numerical-asymptotic boundary integral methods in high-frequency acoustic scattering

SN Chandler-Wilde, IG Graham, S Langdon… - Acta …, 2012 - cambridge.org
In this article we describe recent progress on the design, analysis and implementation of
hybrid numerical-asymptotic boundary integral methods for boundary value problems for the …

A new weak Galerkin finite element method for the Helmholtz equation

L Mu, J Wang, X Ye - IMA Journal of Numerical Analysis, 2015 - academic.oup.com
An absolutely stable weak Galerkin (WG) finite element method is introduced and analysed
for the Helmholtz equation. This means that the stability and well-posedness of the method …

A novel nonlinear solution for the polygon scaled boundary finite element method and its application to geotechnical structures

K Chen, D Zou, X Kong, A Chan, Z Hu - Computers and Geotechnics, 2017 - Elsevier
The polygon scaled boundary finite element method is semi-analytical and known for its
high precision. However, the material nonlinearity cannot be maintained because this …

Fast model order reduction boundary element method for large-scale acoustic systems involving surface impedance

X Xie, W Wang, K He, G Li - Computer Methods in Applied Mechanics and …, 2022 - Elsevier
This paper presents a newly developed fast model order reduction boundary element
method (FMORBEM) for three-dimensional acoustic wave problems with the impedance …

Wave-number-explicit bounds in time-harmonic scattering

SN Chandler-Wilde, P Monk - SIAM Journal on Mathematical Analysis, 2008 - SIAM
In this paper we consider the problem of scattering of time-harmonic acoustic waves by a
bounded, sound soft obstacle in two and three dimensions, studying dependence on the …

Condition number estimates for combined potential integral operators in acoustics and their boundary element discretisation

T Betcke, SN Chandler‐Wilde… - … Methods for Partial …, 2011 - Wiley Online Library
We consider the classical coupled, combined‐field integral equation formulations for time‐
harmonic acoustic scattering by a sound soft bounded obstacle. In recent work, we have …

Condition number estimates for combined potential boundary integral operators in acoustic scattering

SN Chandler-Wilde, IG Graham, S Langdon… - The Journal of Integral …, 2009 - JSTOR
We study the classical combined field integral equation formulations for time-harmonic
acoustic scattering by a sound soft bounded obstacle, namely the indirect formulation due to …

A numerical study on the weak Galerkin method for the Helmholtz equation

L Mu, J Wang, X Ye, S Zhao - Communications in Computational …, 2014 - cambridge.org
A weak Galerkin (WG) method is introduced and numerically tested for the Helmholtz
equation. This method is flexible by using discontinuous piecewise polynomials and retains …

A wavenumber independent boundary element method for an acoustic scattering problem

S Langdon, SN Chandler-Wilde - SIAM Journal on Numerical Analysis, 2006 - SIAM
In this paper we consider the impedance boundary value problem for the Helmholtz
equation in a half-plane with piecewise constant boundary data, a problem which models …

Analysis of a spectral-Galerkin approximation to the Helmholtz equation in exterior domains

J Shen, LL Wang - SIAM journal on numerical analysis, 2007 - SIAM
An error analysis is presented for the spectral-Galerkin method to the Helmholtz equation in
2-and 3-dimensional exterior domains. The problem in unbounded domains is first reduced …