SHEN Lian： Simulation-based study of wind–wave interactions under various sea conditions
报告人：SHEN Lian 教授
Professor Lian Shen received his bachelor’s degree from USTC in 1993 and doctoral degree from MIT in 2001. He is currently a full professor on the faculty of Department of Mechanical Engineering at University of Minnesota. He also serves as the Director of the Saint Anthony Falls Lab, which is a multidisciplinary fluid mechanics institute consisting of about 60 faculty and staff members. Prof. Shen’s research interests are in computational and theoretical studies of fluid mechanics. He has published extensively in top journals in fluid mechanics, and played a leading role in theoretical and computational studies of many large collaborative projects in USA.
Despite their impact on the ocean environment, key physical processes in wind-wave interactions are poorly understood. Using a solver developed for undulatory boundaries, we perform numerical simulations of wind-wave systems under various sea conditions, including wind over monochromatic waves, early wind-wave generation, and wind over a broadband wave field. Our results show that the wave direction and wave age can significantly change the streamwise vorticity distribution in the wind field. Different wave patterns are observed in the process of wind-wave generation. In a broadband wave field, the wave growth rate due to wind input is found to depend on the wave steepness.