Nonlinear breaking-wave characteristics in lagrangian coordinates

Wen Jer Tseng, Chia Yan Cheng

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents a theoretical investigation of nonlinear surface-wave propagation over a sloping bottom. For a problem with nonlinear surface-wave propagation over a sloping bottom, a perturbation method is first used to find the analytical solution in order to derive the third order terms for the bottom slope α and the wave steepness ∈ in the Eulerian system. Then, by transforming the flow field solution from the Eulerian system into the Lagrangian system, a more accurate wave profile is identified. By using the kinematic stability parameter, new theoretical breaking-wave characteristics are derived. The theoretical solutions are then compared with those from other research. The results reveal that the present solution reasonably describes the wave-breaking phenomenon. In this paper, a new theoretical solution for the breaking-wave characteristics is provided, and it is a useful approach for predicting breaking-wave characteristics.

Original languageEnglish
Pages (from-to)149-157
Number of pages9
JournalJournal of Marine Science and Technology (Taiwan)
Volume28
Issue number3
DOIs
Publication statusPublished - 2020 Jun 1

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Ocean Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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