Spectral Galerkin boundary element methods for high-frequency sound-hard scattering problems

Fatih Ecevit, Yassine Boubendir, Akash Anand, Souaad Lazergui

Research output: Contribution to journalArticlepeer-review


This paper is concerned with the design of two different classes of Galerkin boundary element methods for the solution of high-frequency sound-hard scattering problems in the exterior of two-dimensional smooth convex scatterers. We prove in this paper that both methods require a small increase (in the order of kϵ for any ϵ> 0) in the number of degrees of freedom to guarantee frequency independent precisions with increasing wavenumber k. In addition, the accuracy of the numerical solutions are independent of frequency provided sufficiently many terms in the asymptotic expansion are incorporated into the integral equation formulation. Numerical results validating O(kϵ) algorithms are presented.

Original languageEnglish (US)
Pages (from-to)803-847
Number of pages45
JournalNumerische Mathematik
Issue number3
StatePublished - Mar 2022

All Science Journal Classification (ASJC) codes

  • Computational Mathematics
  • Applied Mathematics


  • Frequency independent solutions
  • High-frequency scattering
  • Integral equations


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