Disappeared Recirculating Wake -- On The Mechanism Behind Flow Past Bluff Body
报告人：Peng Yu (Associate Professor, Southern University of Science and Technology)
报告内容：The flow around bluff bodies is the classic flow problems because of its academic value and the related engineering significance associated with structural design, flow-induced vibration etc. However, the bluff bodies investigated are impermeable in most of the previous studies. Flow past bluff porous bodies has attracted relatively less attention so far although such flows also occur widely in industries. In the present talk, a finite volume method based on the body-fitted and multi-block grids is applied to simulate the flow problems involving the porous-fluid interface with complex geometry. Typically, the flow around and through the porous bluff body is investigated. It is found that the recirculating wake existing downstream of a porous bluff body may be completely detached from the body in a certain range of parameters. In a certain range of Darcy number, the wake may initially increase in size with an increase in Reynolds number but then decrease in size and eventually disappear when the Reynolds number is sufficiently large. The underlying physics behind these interesting phenomena are discussed.
报告人简介：Dr. YU Peng is an Associate Professor in the Department of Mechanics and Aerospace Engineering at Southern University of Science and Technology (SUSTech). Dr. Yu obtained his Bachelor and Master degrees in Xi'an Jiaotong University and PhD degree in Mechanical Engineering at National University of Singapore. Before joined SUSTech, he has worked at Nanyang Technological University, National University of Singapore, The University of Sydney, Data Storage Institute (A*STAR, Singapore), Institute of High Performance (A*STAR, Singapore). Dr. Yu’s research interests include numerical simulation of a wide range of fluid and thermal problems. He has published more than 50 journal papers. Dr. Yu was awarded Thousand Youths Talents Plan Program in 2015.