A Perfect Absorbing Layer for High-Order Simulation of Wave Scattering Problems

  • Li-Lian WangEmail author
  • Zhiguo Yang
Conference paper
Part of the Lecture Notes in Computational Science and Engineering book series (LNCSE, volume 119)


We report a novel approach to design artificial absorbing layers for spectral-element discretisation of wave scattering problems with bounded scatterers. It is essentially built upon two techniques: (i) a complex compression coordinate transformation that compresses all outgoing waves in the open space into the artificial layer, and then forces them to be attenuated and decay exponentially; (ii) a substitution (for the unknown) that removes the singularity induced by the transformation, and diminishes the oscillations near the inner boundary of the layer. As a result, the solution in the absorbing layer has no oscillation and is well-behaved for arbitrary high wavenumber and very thin layer. It is therefore well-suited and perfect for high-order simulations of scattering problems.



The authors thank Dr. Bo Wang from Hunan Normal University, China, for discussions at the early stage of this topic. L. Wang would like to thank the Scientific Committee and local organizers of ICOSAHOM 2016 for the conference invitation to Rio de Janeiro, Brazil. The work of two authors was partially supported by Singapore MOE AcRF Tier 1 Grant (RG 27/15) and MOE AcRF Tier 2 Grant (MOE 2013-T2-1-095, ARC 44/13).


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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Division of Mathematical SciencesSchool of Physical and Mathematical Sciences, Nanyang Technological UniversitySingaporeSingapore
  2. 2.Department of MathematicsPurdue UniversityWest LafayetteUSA

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