Nonlinear Ocean Wave Models and Laboratory Simulation of High Sea States and Rogue Waves

Date: 
Friday, April 28, 2017 - 2:30pm
Location: 
3110 Etcheverry Hall
Speaker: 
Professor Solomon C. Yim

Glenn Willis Holcomb Professor of Structural Engineering

Oregon State University

About: 

E-201 Ocean Engineering Seminar Series, Spring 2017

 

2:00 - 2:30pm Beverages & Refreshments

2:30 - 4:00pm Seminar

 

With the increasing demand for marine structures, including ships and wave energy devices, to operate in energetic, high sea states, the need for modeling and simulation of nonlinear ocean wave fields in large-scale wave basins is becoming essential. In response to this demand, a number of large-scale wave basins have been placed into operation over the years and larger and more sophisticated new ones are under planning and construction. In this article, the current state of practice and technical issues in modeling and simulation of high sea state ocean waves are summarized. A novel methodology for quantitative evaluation of the suitability of competing linear and nonlinear wave theories for a given wave field with multi-spatial measurements is presented. Preliminary results of an on-going study on wave modeling and analysis of measured data from a wave simulation performance study of the Oregon State University directional wave basin, using nonlinear wave theory (e.g. the nonlinear Schrödinger equation), nonlinear Fourier analysis and inference to the existence of rogue waves, are presented. Suggestions on future development of nonlinear wavemaker theories and numerical modeling and simulation of large-scale wave basin nonlinear wave generation are proposed. The article concludes with some observations and remarks on the importance of using an appropriate wave theory to determine the existence of nonlinear coherence structures, including breathers and rogue waves. 

Biography: 

Solomon Yim, (B.S. Rice University; M.S., M.A. and Ph.D., UC Berkeley) is Glenn Willis Holcomb Professor of Structural Engineering and former Director of the OSU Hinsdale Wave Research Laboratory at Oregon State University. His research interests include fluid and structural mechanics in the marine environment; high-performance computing; wave breaking and impact in shallow water and the surf zone, with applications in response prediction and analysis of civil, industrial and naval engineering systems. Dr. Yim is a registered professional engineer, and a fellow of both the American Society of Mechanical Engineers (ASME) and the American Society of Civil Engineers (ASCE). He is the editor-in-chief of the ASME Journal of Offshore Mechanics and Arctic Engineering, and associate editor of several other ocean-engineering related journals. He was an ONR Young Investigator; US Navy Senior Faculty Research Fellow; and Royal Norwegian Research Council Senior Visiting Research Scientist.

 

Hosted by: Prof. Fai Ma <fma@berkeley.edu>