报告人：Lian Shen, Sc.D.
Benjamin Mayhugh Associate Professor, Department of Mechanical Engineering
Associate Director for Research, St. Anthony Falls Laboratory
University of Minnesota, USA
The interactions of turbulence with surface gravity waves and structures have many important applications in ocean sciences and engineering. Examples include hydrodynamics of ships and offshore structures, atmosphere-ocean exchange of mass, momentum, and heat, oil spills at sea, and renewable energy from offshore wind and waves. Recent advancements in computation algorithms and the increase in computing power have made numerical simulation a powerful tool for ocean science and engineering research. In this talk, several numerical methods used in my lab will first be introduced, including phase-resolved wave simulation, DNS and LES of turbulence at wavy surfaces, simulation of multiphase flows, and fluid-structure interaction. Some new understanding of the flow physics gained from simulation-based study will then be discussed. Finally, examples of applications, such as the simulations of offshore floating wind turbines and wind loads on semi-submerged structures, will be given.
Dr. Lian Shen earned his bachelor‘s degree from Department of Modern Mechanics at University of Science and Technology of China in 1993 and his doctoral degree from Department of Ocean Engineering at Massachusetts Institute of Technology in 2001. He currently holds the position of Benjamin Mayhugh Associate Professor in Department of Mechanical Engineering at University of Minnesota. He also serves as the Associate Director for Research at the Saint Anthony Falls Laboratory, which is a multidisciplinary fluid mechanics institute at University of Minnesota consisting of over 50 faculty and staff and many students. Dr. Shen’s research focuses on computational fluid dynamics of free-surface flows, turbulent flows, and flow-structure interaction. Many of his studies concentrate on the fundamental mechanisms of wave-turbulence interaction, wind-wave interaction, and wave-current interaction. He is also active in many aspects of ocean engineering and offshore wind energy research. He has participated and played a leading role in the computational efforts in many large collaborative ocean-focused projects in the United States.