Refining an eddy viscosity model for two-dimensional breaking waves in deep water: Experiments

Zhigang Tian, Wooyoung Choi, Marc Perlin

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

Abstract

This paper presents an experimental study of breaking waves in deep water, as part of the effort to further develop an eddy viscosity model for wave breaking, originally proposed by Tian, Perlin & Choi (2010, J. Fluid Mech. 655, 217-257). In the previous work, the wave breaking time, location, and breaking strength were required a priori for numerical simulations. It is our intention to make further refinement so that the improved eddy viscosity model automatically predicts wave breaking onset, determines local wave parameters at breaking onset, and forecasts post-breaking time and length scales to estimate the magnitude of the eddy viscosity. As the first part of the further development, we conducted wave breaking experiments, in which breaking wave groups are generated using both wave energy focusing and modulational instability. Surface elevations as a function of time are measured and surface profiles as a function of space during active breaking events are captured. Local wave parameters at wave breaking onset (pre-breaking parameters) are defined and determined, as well as the post-breaking time and length scales. Correlations among the parameters at breaking onset and the post-breaking scales are identified. Similarities and differences of the two types of breaking wave groups are provided and discussed.

Original languageEnglish (US)
Title of host publicationASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2011
Pages755-762
Number of pages8
DOIs
StatePublished - Dec 1 2011
EventASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2011 - Rotterdam, Netherlands
Duration: Jun 19 2011Jun 24 2011

Publication series

NameProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume6

Other

OtherASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2011
CountryNetherlands
CityRotterdam
Period6/19/116/24/11

All Science Journal Classification (ASJC) codes

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

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