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Radiation boundary ...
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Engquist, BjörnUppsala universitet,KTH,Numerisk analys, NA,Institutionen för teknisk databehandling
(författare)
Radiation boundary conditions for acoustic and elastic wave calculations
- Artikel/kapitelEngelska1979
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Wiley,1979
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LIBRIS-ID:oai:DiVA.org:kth-90521
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-90521URI
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https://doi.org/10.1002/cpa.3160320303DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-25645URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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NR 20140805
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A technique for developing radiating boundary conditions for artificial computational boundaries is described and applied to a class of problems typical in exploration seismology involving acoustic and elastic wave equations. First, one considers a constant coefficient scalar wave equation where the artificial boundary is one edge of a rectangular domain. By using continued fraction expansions, a systematic sequence of stable highly absorbing boundary conditions with successively better absorbing properties as the order of the boundary conditions increases is obtained. There follows a systematic derivation of a hierarchy of local radiating boundary conditions for the elastic wave equation. A theoretical procedure to guarantee stability at corners of the rectangular domain is worked out. A technique for fitting the discrete radiating boundary conditions directly to the difference scheme itself is proposed.
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Majda, A
(författare)
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KTHNumerisk analys, NA
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Communications on Pure and Applied Mathematics: Wiley32:3, s. 314-3580010-36401097-0312
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