Long Waves Associated with Bichromatic Waves--《China Ocean Engineering》2001年02期

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Long Waves Associated with Bichromatic Waves

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董国海 叶文亚 Nicholas Dodd

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【摘要】:正 A numerical model of low frequency waves is presented. The model is based on that of Roelvink (1993), but the nu-merical techniques used in the solution are based on the so-called Weighted-Average Flux (WAF) method with Time-Operator-Splitting (TOS) used for the treatment of the source terms. This method allows a small number of computational points to be used, and is particularly efficient in modeling wave setup. The short wave (or primary wave) energy equation is solved with a traditional Lax-Wendroff technique. A nonlinear wave theory is introduced. The model described in this paper is found to be satisfactory in modeling low frequency waves associated with incident bichromalic waves.

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incident waves; bichromatic waves; long wares; ware breaking

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【基金】:This project was supported by the British Council

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1.IntrOduction N0 matter whether the main wave activity iS a locally generated“sea“or swell。waves tendto form into groups,inducing long waves which have troughs coinciding with the largest wavesin the group.Long waves share the group period(typically

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