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Erschienen in:
1986 | OriginalPaper | Buchkapitel
Spatial Oscillations
verfasst von : Ingemar Kinnmark
Erschienen in: The Shallow Water Wave Equations: Formulation, Analysis and Application
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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There is an upper limit to the frequency of a wave which can be represented on a discrete grid using a numerical approximation of a partial differential equation. If a higher frequency wave is utilized it will be aliased into (i.e. be indistinguishable from) a wave of a lower frequency on the given mesh. It is important to realize that this limiting maximum frequency, or equivalently limiting minimum wave length, stems from two inherently different effects.