Non-uniform grid accelerated local-global boundary condition (NG-LGBC) for acoustic scattering

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A global absorbing boundary condition utilizing accelerated integration scheme based on the non-uniform grid (NG) approach is hybridized with a local boundary condition, producing an accurate and efficient mesh truncation scheme for finite method analysis of open-region acoustic scattering problems. The method affords arbitrarily shaped, in particular non-convex boundaries that conform to essentially concave obstacles of dimensions large compared with the wavelength.

Original languageEnglish
Pages (from-to)3608-3621
Number of pages14
JournalComputer Methods in Applied Mechanics and Engineering
Issue number29-32
StatePublished - 1 Jun 2006


  • Absorbing boundary condition
  • Acoustic scattering
  • Fast methods
  • Global boundary condition
  • Kirchoff integral


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