Numerical investigation of shear stress under plunging breaker on a sloping beach

Lian Tang, Onyx W.H. Wai

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

In this study, a two-dimensional numerical model (NEWFLUME) is applied to investigate the shear stress distributions in the bubbly flow on a sloping beach (1/20) under breaking waves. The numerical model solves the Reynolds equations for mixture flow and employs the volume-of-fluid (VOF) method to track the free surfaces. Turbulence closure is accomplished by the k-e scheme. An improved air entrainment model is incorporated to consider the effect of bubbles on the mean flow in present model. The bed stress distributions and the effect of bubbles on shear stress are investigated. It is found that the bed stress decreases by the existence of bubbles in the aeration region. The maximum value of time dependent total shear stress is damped approximately 12% and the depth integrated total shear stress shows a 20% decrement.

Original languageEnglish
Title of host publicationProceedings of the 27th International Ocean and Polar Engineering Conference, ISOPE 2017
PublisherSociety of Petroleum Engineers
Pages356-359
Number of pages4
ISBN (Electronic)9781880653975
Publication statusPublished - 1 Jan 2017
Event27th International Ocean and Polar Engineering Conference, ISOPE 2017 - San Francisco, United States
Duration: 25 Jun 201730 Jun 2017

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Conference

Conference27th International Ocean and Polar Engineering Conference, ISOPE 2017
CountryUnited States
CitySan Francisco
Period25/06/1730/06/17

Keywords

  • Bed stress
  • Breaking wave
  • Bubbles' effects
  • Numerical simulation

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

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