Memory cost of absorbing conditions for the finite-difference time-domain method
| Autor: | Lauri Savioja, Pierre Chobeau |
|---|---|
| Přispěvatelé: | Department of Computer Science, Aalto-yliopisto, Aalto University |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
ta113
Acoustics and Ultrasonics business.industry Mathematical analysis Finite-difference time-domain method Scalar (physics) 010103 numerical & computational mathematics Lossy compression 01 natural sciences Mathematics::Numerical Analysis 030507 speech-language pathology & audiology 03 medical and health sciences Optics Perfectly matched layer Arts and Humanities (miscellaneous) Acoustic wave absorption Reflection (physics) Boundary value problem 0101 mathematics 0305 other medical science business Incidence (geometry) Mathematics |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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