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Nonlinear Model of Mean Free Surface of Waves

China Ocean Engineering 1999年第2期14卷 155-162页

作者： nicholas dodd Ph. D. Coastal Group HR Wallingford Howbery Park Wallingford

A nonlinear model of mean free surface of waves or wave set-up is presented. The model is based on that of Roelvink (1993), but the numerical techniques used in the solution are based on the Weighted-Average Flux (WAF) method (Watson el al., 1992), 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 set-up. The short wave (or primary wave) energy equation is solved by use of a more traditional Lax-Wendroff technique. A nonlinear wave theory (James, 1974) is introduced. The model described in this paper is found to be satisfactory in most respects when compared with the measurements conducted by Stive (1983) except in modeling the mean free surface very close to the mean shoreline.

关键词： mean free surface radiation stress hyperbolic wave theory nonlinear model wave propagation

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Long Waves Associated with Bichromatic Waves

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China Ocean Engineering 2001年第2期16卷 281-289页

作者：董国海叶文亚 nicholas dodd The State Key Laboratory of Coastal and O ffshore Engineering Dalian University of Technology Dalian 116023 China Coastal Group HR Wallingford Howbery Park W allingford OX10 8BA U. K.

A numerical model of low frequency waves is presented. The model is based on that of Roelvink (1993), but the numerical techniques used in the solution are based on the so-called Weighted- Average Flux (WAF) method with Time-Operator- Splitting JOS) 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 bichromatic waves.

关键词： incident waves bichromatic waves long waves wave breaking

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A Nonlinear Model of Surf Beat

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China Ocean Engineering 1995年第2期10卷 193-203页

作者： nicholas dodd Coastal Group HR WallingfordHowbery RarkWallingford

A nonlinear short-wave-averaged (surf beat) model is presented. The model is based on that of Roelvink (1993), but the numerical techniques used in the solution are based on the so-called weighted-averaged flux (WAF) method (eg Watson et al., 1992), with time-operator splitting used for the treatment of some of the source terms. This method allows a small number of computational points to be used, and is particularly efficient in modelling breaking long waves. The short-wave (or primary-wave) energy equation is solved using a more traditional Lax-Wendroff technique. Results of validation indicate that the model performs satisfactorily in most respects.

关键词： surf beat long wave surf zone

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Visualising the heart of chaos

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Light(Science & Applications) 2021年第12期10卷 2256-2257页

作者： nicholas J.Lambert Harald G.L.Schwefel Department of Physics University of OtagoDunedinNew Zealand The dodd-Walls Centre for Photonic and Quantum Technologies DunedinNew Zealand

The intra-cavity electro-magnetic field distribution in a microdisk resonator can be visualised by inducing a phase shift via a scanning probe beam.

关键词： resonator chaos Visual

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