Memory cost of absorbing conditions for the finite-difference time-domain method

Pierre Chobeau*, Lauri Savioja

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Three absorbing layers are investigated using standard rectilinear finite-difference schemes. The perfectly matched layer (PML) is compared with basic lossy layers terminated by two types of absorbing boundary conditions, all simulated using equivalent memory consumption. Lossy layers present the advantage of being scalar schemes, whereas the PML relies on a staggered scheme where both velocity and pressure are split. Although the PML gives the lowest reflection magnitudes over all frequencies and incidence angles, the most efficient lossy layer gives reflection magnitudes of the same order as the PML from mid- to high-frequency and for restricted incidence angles.

Original languageEnglish
Pages (from-to)EL119-EL124
JournalJournal of the Acoustical Society of America
Volume140
Issue number1
DOIs
Publication statusPublished - 1 Jul 2016
MoE publication typeA1 Journal article-refereed

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