STRUCTURE OF FREQUENCY DOMAIN MODELS FOR RANDOM WAVE BREAKING

Proceedings of the International Conference on Coastal Engineering

James M. Kaihatu¹  James T. Kirby² 

[1] Oceanography Division (Code 7322), Naval Research Laboratory, Stennis Space Center;Center for Applied Coastal Research, University of Delaware

关键词: frequency domain;    model structure;    random waves;    wave breaking;   

DOI  :  10.9753/icce.v25.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

We consider the form of a breaking wave dissipation term for use in spectral or stochastic wave evolution models. A time-domain Boussinesq model is tested for accuracy in modelling evolution of second and third moment statistics in shoaling and breaking waves. The structure of the dissipation term in the time domain is then used to infer the corresponding structure of the term in the frequency domain. In general, we find that the dissipation coefficient is distributed like l/S^(f), where Sv(f) is the spectral density of the surface displacement rj. This implies an /2 dependence for the coefficient in the inner surfzone, as opposed to a constant distribution over frequency as suggested by Eldeberky and Battjes (1996).

【 授权许可】

Unknown