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dc.contributor.author
van Manen, Dirk-Jan
dc.contributor.author
Li, Xun
dc.contributor.author
Vasmel, Marlies
dc.contributor.author
Broggini, Filippo
dc.contributor.author
Robertsson, Johan O.A.
dc.date.accessioned
2020-08-03T07:18:52Z
dc.date.available
2020-08-02T15:07:00Z
dc.date.available
2020-08-03T07:08:33Z
dc.date.available
2020-08-03T07:18:52Z
dc.date.issued
2020-06-26
dc.identifier.issn
0956-540X
dc.identifier.issn
1365-246X
dc.identifier.other
10.1093/gji/ggaa317
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/429596
dc.identifier.doi
10.3929/ethz-b-000429596
dc.description.abstract
In numerical modelling of wave propagation, the finite-difference (FD) injection method enables the re-introduction of simulated wavefields in model subdomains with machine precision, enabling the efficient calculation of waveforms after localized model alterations. By rewriting the FD-injection method in terms of sets of equivalent sources, we show how the same principles can be applied to achieve on-the-fly wavefield extrapolation using Kirchhoff–Helmholtz (KH)-like integrals. The resulting extrapolation methods are numerically exact when used in conjunction with FD-computed Green’s functions. Since FD injection only relies on the linearity of the wave equation and compactness of FD stencils in space, the methods can be applied to both staggered and non-staggered discretizations with arbitrary-order spatial operators. Examples for both types of discretizations show how these extrapolators can be used to truncate models with exact absorbing or immersive boundary conditions. Such immersive modelling involves the evaluation of KH-type extrapolation and representation integrals in the same simulation, which include the long-range interactions missing from conventional FD injection.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Oxford University Press
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Numerical modelling
en_US
dc.subject
Numerical solutions
en_US
dc.subject
Wave propagation
en_US
dc.title
Exact extrapolation and immersive modelling with finite-difference injection
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Geophysical Journal International
ethz.journal.volume
223
en_US
ethz.journal.issue
1
en_US
ethz.journal.abbreviated
Geophys. J. Int.
ethz.pages.start
584
en_US
ethz.pages.end
598
en_US
ethz.size
15 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
MAchine for Time Reversal and Imersive wave eXperiments
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Oxford
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02506 - Institut für Geophysik / Institute of Geophysics::03953 - Robertsson, Johan / Robertsson, Johan
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02506 - Institut für Geophysik / Institute of Geophysics::03953 - Robertsson, Johan / Robertsson, Johan
en_US
ethz.grant.agreementno
694407
ethz.grant.fundername
EC
ethz.grant.funderDoi
10.13039/501100000780
ethz.grant.program
H2020
ethz.date.deposited
2020-08-02T15:07:10Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-08-03T07:08:48Z
ethz.rosetta.lastUpdated
2024-02-02T11:30:27Z
ethz.rosetta.versionExported
true
ethz.COinS
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