Anomalous Dispersion in Numerical Models of Wave Spectra
When numerical models are used to compute wave spectra at relatively large distances from a storm, the results may be characterized by a patchy distribution of wave energy. This patchiness is a direct consequence of the discrete nature of the wave spectrum in numerical models. To avoid this problem by increasing resolution is computationally expensive, so it is useful to seek a numerical scheme which might minimize this effect. A finite-element analysis suggests that such a scheme might involve advection terms which are averaged over adjacent spectral contributions.
KeywordsGroup Velocity Wave Spectrum Anomalous Dispersion Spectral Average Spatial Smoothing
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