Boundary layer development under breaking wave

Nguyen Thai Binh, Yuta Mitobe, Hitoshi Tanaka, Nguyen Xuan Tinh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to investigate the development process of the flow field and bottom boundary layer under breaking wave, a series of dam break experiment was carried out to simulate the propagation of a bore over coastal area. Particle image velocimetry (PIV) method was applied to obtain 2D flow field in vertical and streamwise direction. Following the sudden movement of upstream gate, a breaking bore is generated and propagation of bore was done on four different initial water depth conditions, each with five repeats to investigate different flow motion and process of boundary layer development under the bores. The repeatability of the generated waveform is good, however, turbulent structure of breaking bore, especially on the surface is complex and as a result, difference in velocity measurement is unavoidable. From the resulted velocity profile, is seen that breaking bore in a dey bed undergoes one uniform flow regime. The high momentum and turbulence are transported in whole water column overtime, alongside with the development of a bottom boundary layer.

Original languageEnglish
Title of host publicationAPAC 2019 - Proceedings of the 10th International Conference on Asian and Pacific Coasts
EditorsNguyen Trung Viet, Tran Thanh Tung, Dou Xiping
PublisherSpringer
Pages767-771
Number of pages5
ISBN (Print)9789811502903
DOIs
Publication statusPublished - 2020
Event10th International Conference on Asian and Pacific Coasts, APAC 2019 - Hanoi, Viet Nam
Duration: 2019 Sep 252019 Sep 28

Publication series

NameAPAC 2019 - Proceedings of the 10th International Conference on Asian and Pacific Coasts

Conference

Conference10th International Conference on Asian and Pacific Coasts, APAC 2019
Country/TerritoryViet Nam
CityHanoi
Period19/9/2519/9/28

Keywords

  • Boundary layer
  • Dam break
  • PIV
  • Turbulence
  • Velocity profile

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics
  • Ecology

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