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Radiation boundary ...
Radiation boundary conditions for acoustic and elastic wave calculations
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- Engquist, Björn (författare)
- Uppsala universitet,KTH,Numerisk analys, NA,Institutionen för teknisk databehandling
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Majda, A (författare)
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(creator_code:org_t)
- Wiley, 1979
- 1979
- Engelska.
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Ingår i: Communications on Pure and Applied Mathematics. - : Wiley. - 0010-3640 .- 1097-0312. ; 32:3, s. 314-358
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Data- och informationsvetenskap (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences (hsv//eng)
- NATURVETENSKAP -- Matematik -- Beräkningsmatematik (hsv//swe)
- NATURAL SCIENCES -- Mathematics -- Computational Mathematics (hsv//eng)
Nyckelord
- ACOUSTIC PROPAGATION
- BOUNDARY CONDITIONS
- BOUNDARY VALUE PROBLEMS
- ELASTIC WAVES
- RADIATIVE TRANSFER
- SOUND WAVES
- COMPUTER TECHNIQUES
- ERROR ANALYSIS
- FAR FIELDS
- SEISMOLOGY
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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