题目：Passive Enhancement of Natural Convection Heat Transfer Using a Flexible Baffle

时间：2023年7月10日 10:00-11:00

地点：机械与动力工程学院 F203会议室

邀请人：赵长颖 教授（工程热物理研究所）

Biography

Chengwang Lei is a professor in the School of Civil Engineering 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 and PhD (2000) in Civil Engineering at The University of Western Australia. His research spans multiple disciplines with environmental, industrial, and domestic applications and adopts combined experimental, numerical, and analytical approaches. Prof Lei is a Founding Fellow of Asian Union of Thermal Science and Engineering (AUTSE) and a member of the AUTSE Executive Board. He is serving as Associate Editor of Journal of Enhanced Heat Transfer (Begell House) and Editorial Board Member of multiple journals including Energy and Buildings (Elsevier), Heat Transfer (Wiley), and Discover Mechanical Engineering (Springer). 

Abstract

I will first give an overview of our research on various topics including hydrodynamics of bluff bodies, buoyancy driven flows, thermal boundary layer, and heat transfer enhancement, as well as our ongoing work on urban heat island and urban environment. I will then introduce a recent numerical study on enhancing heat transfer by natural convection using a self-oscillating flexible baffle. In this work, an immersed boundary-lattice Boltzmann method (IB-LBM) is adopted to solve the coupled thermal-fluid-structure interaction (TFSI) problem. The effects of various flow and baffle parameters on the dynamics of the flexible baffle and consequent heat transfer performance will be discussed. It is revealed that a flexible baffle is superior to a rigid baffle for enhancing heat transfer.