Title：Flow over confined circular cylinders

Reporter：Prof.Chengwang Lei  University of Western Australia

Time：7 March 2023 (Tuesday) 16:00~17:00

Venue：B1-d219,Guangzhou International Campus, South China University of Technology

Tencent Meeting ID：796-264-131

Abstract：

Flow past confined circular cylinders positioned between two parallel walls is common in engineering applications. Although the effects of confinement (or blockage) on the flow behaviour and hydrodynamics of circular cylinders have been reported previously, there exists a clear knowledge gap in terms of the hydrodynamic properties of confined cylinders (i.e., drag, lift and Strouhal number). Further, the behaviours of separated shear layers, wake dynamics, and lock-on of confined cylinders at relatively high blockage ratios are not well understood. In this presentation I will provide an overview of our recent numerical (Direct Numerical Simulation and Large Eddy Simulation) and experimental (Particle Image Velocimetry) work on confined circular cylinders over a wide range of blockage ratios and Reynolds numbers.

Resume:

Chengwang Lei is a Professor in the School of Civil Engineering and Deputy Director of the Centre for Wind, Waves and Water at The University of Sydney, Australia. Prof Lei received his Bachelor (1988) and Master (1992) degrees in Mechanical Engineering at Huazhong University of Science & Technology, China and PhD (2000) in Civil and Resource Engineering at The University of Western Australia. His research spans multiple fields with environmental, industrial, and domestic applications and adopts combined experimental, numerical, and analytical approaches to advance understandings. Prof Lei is a Founding Fellow of Asian Union of Thermal Science and Engineering (AUTSE) and a current Executive Board member of the AUTSE. He is serving as Associate Editor for Journal of Enhanced Heat Transfer (Begell House) and Editorial Board Member for Energy and Buildings (Elsevier), Heat Transfer (Wiley), and Discover Mechanical Engineering (Springer) journals. More information about Prof Chengwang Lei’s teaching, research, and publications may be found on his profile page at https://www.sydney.edu.au/engineering/about/our-people/academic-staff/chengwang-lei.html