Improvement and application of a saturation based wave dissipation function in SWAN model

查看全文 作　　者：WANG [1,2]Yi;JIANG [3]Xingwei

机构地区：[1]Ocean University of China,Qingdao 266100,China;[2]National Marine Environmental Forecasting Center,State Ocean Administration,Beijing 100081,China;[3]National Satellite Ocean Application Service,State Oceanic Administration,Beijing 100081,China

出　　处：《Acta Oceanologica Sinica》索引2012年第31卷第1期,共9页

基　　金：The Public Science and Technology Research Funds Projects of Ocean,State Oceanic Administration of the People’s Republic of China,under contract No.201005033 摘　　要：Wave dissipation characteristics in SWAN (Simulating Waves Nearshore) model are investigated through numerical experiments. It is found that neither the fully developed integral parameters of wind waves (significant wave height and peak frequency) nor the high frequency spectral tail can be well reproduced by the default wave dissipation source terms. A new spectral dissipation source term is proposed, which comprises saturation based dissipation above two times of peak frequency and improved whitecapping dissipation at lower frequency spectrum. The reciprocal wave age (u /c p ) is involved into the whitecapping model to adjust dissipation rate at different wind speed. The Phillips higher frequency saturation parameter in the saturation-based dissipation is no longer taken as a constant, but varies with wave age. Numerical validations demonstrate that both the wind wave generation process and higher frequency spectrum of wind waves can be well simulated by the new wave dissipation term. 关键词：SWAN模型耗散函数饱和应用峰值频率风浪频谱数值实验数值验证

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Improvement and application of a saturation based wave dissipation function in SWAN model

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