Semi-exact local absorbing boundary condition for seismic wave simulation

Saeed Izadian, Kamal Aghazade, Navid Amini, Yanghua Wang

Research output: Contribution to journalArticlepeer-review

1 Citation (SciVal)
11 Downloads (Pure)

Abstract

An absorbing boundary condition is necessary in seismic wave simulation for eliminating the unwanted artificial reflections from model boundaries. Existing boundary condition methods often have a trade-off between numerical accuracy and computational efficiency. We proposed a local absorbing boundary condition for frequency-domain finite-difference modelling. The proposed method benefits from exact local plane-wave solution of the acoustic wave equation along predefined directions that effectively reduces the dispersion in other directions. This method has three features: simplicity, accuracy and efficiency. Numerical simulation demonstrated that the proposed method has higher efficiency than the conventional methods such as the second-order absorbing boundary condition and the perfectly matched layer (PML) method. Meanwhile, the proposed method shared the same low-cost feature as the first-order absorbing boundary condition method.

Original languageEnglish
Pages (from-to)62-73
Number of pages12
JournalJournal of Geophysics and Engineering
Volume18
Issue number1
DOIs
Publication statusPublished - 1 Feb 2021

Keywords

  • Absorbing boundary condition
  • Acoustic wave equation
  • Frequency-domain finite-difference
  • Perfectly matched layer

ASJC Scopus subject areas

  • Geophysics
  • Geology
  • Industrial and Manufacturing Engineering
  • Management, Monitoring, Policy and Law

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