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

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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.

Yksityiskohdat

AlkuperäiskieliEnglanti
SivutEL119-EL124
JulkaisuJournal of the Acoustical Society of America
Vuosikerta140
Numero1
TilaJulkaistu - 1 heinäkuuta 2016
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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