Hydro-acoustic precursors of gravity waves generated by surface pressure disturbances localised in space and time

Emiliano Renzi*, F. Dias

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

We consider the mechanics of coupled underwater-acoustic and surface-gravity waves generated by surface pressure disturbances in a slightly compressible fluid. We show that pressure changes on the ocean surface, localised in space and time, can induce appreciable underwater compression waves which are precursors of the surface gravity waves. Although the physical properties of acoustic-gravity waves have already been discussed in the literature, such dynamics was not investigated in previous studies. We derive new results for the underwater compression wave field and discuss the dynamics of its generation and propagation. This work could lead to the design of innovative alert systems for coastal flooding management.

Original languageEnglish
Pages (from-to)250-262
Number of pages13
JournalJournal of Fluid Mechanics
Volume754
Issue number2
Early online date31 Jul 2014
DOIs
Publication statusPublished - 10 Sept 2014
Externally publishedYes

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