Low frequency waves in the surf zone

G Watson, DH Peregrine

Research output: Contribution to journalArticle (Academic Journal)

Abstract

The generation of low-frequency waves (LFW, also known as 'infragravity waves') within a two-dimensional surf zone is investigated numerically using a short-wave resolving model. In this simplified model, based on the nonlinear shallow-water equations, breaking waves are represented by 'bores', at which there are jumps in both water depth and velocity. Some idealized trains of modulated waves are then used to investigate how LFW may be generated by forcing within the surf zone, as opposed to the mechanisms of bound wave reflection and moving break point forcing. In this way, the process of LFW generation may be examined in some detail. The model is also compared with some measurements of irregular waves in a flume: good agreement is obtained.
Original languageEnglish
Pages (from-to)818-831
Number of pages13
JournalProceedings of the International Conference on Coastal Engineering
Issue number23
Publication statusPublished - 1993

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