Article (Scientific journals)
An analysis of the steepest descent method to efficiently compute the three-dimensional acoustic single-layer operator in the high-frequency regime
Gasperini, D.; Beise, H.-P.; Schroeder, U. et al.
2023In IMA Journal of Numerical Analysis, 43 (3), p. 1831 - 1854
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Keywords :
acoustic single-layer integral operator; high-frequency scattering; highly oscillatory integrals; steepest descent method; Acoustic single layers; Acoustic single-layer integral operator; Cauchy integral theorems; Frequency regimes; High frequency HF; High-frequency scattering; Highly oscillatory integrals; Integral operators; Steepest-descent method; Wave numbers; Mathematics (all); Computational Mathematics; Applied Mathematics
Abstract :
[en] Using the Cauchy integral theorem, we develop the application of the steepest descent method to efficiently compute the three-dimensional acoustic single-layer integral operator for large wave numbers. Explicit formulas for the splitting points are derived in the one-dimensional case to build suitable complex integration paths. The construction of admissible steepest descent paths is next investigated and some of their properties are stated. Based on these theoretical results, we derive the quadrature scheme of the oscillatory integrals first in dimension one and then extend the methodology to three-dimensional planar triangles. Numerical simulations are finally reported to illustrate the accuracy and efficiency of the proposed approach.
Disciplines :
Mathematics
Author, co-author :
Gasperini, D.;  IEE S.A., Bissen, Luxembourg ; Université de Lorraine, CNRS, Inria, IECL, Nancy, France ; University of Liège, Liège, Belgium
Beise, H.-P.;  FB Informatik, Hochschule Trier, Trier, Germany
Schroeder, U.;  IEE S.A., Bissen, Luxembourg
Antoine, X.;  Université de Lorraine, CNRS, Inria, IECL, Nancy, France
Geuzaine, Christophe  ;  Université de Liège - ULiège > Département d'électricité, électronique et informatique (Institut Montefiore) > Applied and Computational Electromagnetics (ACE) ; Institut Montefiore, Liège, Belgium
Language :
English
Title :
An analysis of the steepest descent method to efficiently compute the three-dimensional acoustic single-layer operator in the high-frequency regime
Publication date :
May 2023
Journal title :
IMA Journal of Numerical Analysis
ISSN :
0272-4979
eISSN :
1464-3642
Publisher :
Oxford University Press
Volume :
43
Issue :
3
Pages :
1831 - 1854
Peer reviewed :
Peer Reviewed verified by ORBi
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