题 目： Immersed-Boundary Simulation on Wake Structures of Moving and Morphing Objects
报告人： 郑 钟 泉 教授 (美国堪萨斯大学航空航天工程系）
时 间： 12月10日（周四）下午1:30
地 点： 应用数学和力学所东会议室
Immersed-Boundary Simulation on Wake Structures of Moving and Morphing Objects
Zhongquan (Charlie) Zheng (郑钟泉), Ph.D.
Abstract: Immersed-boundary (IB) methods typically discretize the governing equations on a Cartesian grid, and generally do not require that the geometry of the boundary conform in any way to this Cartesian grid. Therefore, the IB methods suit the computational needs for studying moving and/or morphing objects in fluid flow. An improved method is employed, which uses direct forcing to distinguish
feedback forcing, along with discussions of direct-forcing
interpolation/extrapolation, resolution requirement, and accuracy of the solution. The results are focused on the flow physics of a multi-parameter dynamic system and vortex dynamic mechanisms of wakes behind oscillating cylinders and flapping/morphing foils.
About the Speaker: About the Speaker: Dr. Zhongquan (Charlie) Zheng is currently Professor and Graduate Program Director in Aerospace Engineering Department at University of Kansas, Fellow of ASME, and Associate Fellow of AIAA. He received his B.S. and M.S. degrees from Department of Engineering Mechanics at Shanghai Jiao Tong University in 1984 and 1987 respectively, and his Ph.D. degree in 1993 from Department of Mechanical Engineering and Mechanics, Old Dominion University where he also conducted research at NASA Langley Research Center. He has been a member or chair of several TCs in ASME and AIAA, actively organizing/co-organizing many sessions/symposia at ASME and AIAA conferences. He is an Associate Editor of Journal of Fluids Engineering.