Development of depth-limited wave boundary layers over a smooth bottom

Hitoshi Tanaka, Xuan Tinh Nguyen, Xiping Yu, Guangwei Liu

Research output: Contribution to journalArticlepeer-review

Abstract

A theoretical and numerical study is carried out to investigate the transformation of the wave boundary layer from non-depth-limited (wave-like boundary layer) to depth-limited one (cur-rent-like boundary layer) over a smooth bottom. A long period of wave motion is not sufficient to induce depth-limited properties, although it has simply been assumed in various situations under long waves, such as tsunami and tidal currents. Four criteria are obtained theoretically for recogniz-ing the inception of the depth-limited condition under waves. To validate the theoretical criteria, numerical simulation results using a turbulence model as well as laboratory experiment data are employed. In addition, typical field situations induced by tidal motion and tsunami are discussed to show the usefulness of the proposed criteria.

Original languageEnglish
Article number27
Pages (from-to)1-17
Number of pages17
JournalJournal of Marine Science and Engineering
Volume9
Issue number1
DOIs
Publication statusPublished - 2021 Jan

Keywords

  • Boundary layer thickness
  • Depth-limited condition
  • Shoaling tsunami
  • Smooth turbulent flow
  • Tidal current
  • Wave boundary layer

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology
  • Ocean Engineering

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