报告人：Professor Hui Xu（Department of Aeronautics & Department of Mathematics, Imperial College London）
报告时间：2017年9月27日（周三），14：00-15：00
报告地点：苏州大学本部精正楼二楼报告厅
报告摘要：
Laminar–turbulent transition in boundary layers is a fundamental topic, understanding of which has special significance in science and engineering. Modelling the transition process from laminar to turbulent flow poses considerable theoretical and numerical challenges due to the complex nature of the nonlinear breakdown, disparate length and time fluctuations arising and uncertainties regarding the inflow or so-called receptivity process. The well-known Tollmien–Schlichting wave (TS) excited at the receptivity stage, plays an important role in boundary layer tripping. Practically, due to unavoidable surface imperfections, at least two issues arise: (i) additional receptivity and generation of alternative TS waves, which may then interact with the pre-existing TS disturbance(s); and (ii) interaction between pre-existing TS waves and the distorted base flow. In this talk, we present recent research work on the second issue, which is still a well-known task of current international research.
报告人简介
Dr. Hui Xu is a researcher in the Department of Aeronautics and the Department of Mathematics at Imperial College London. His research interests span applied/computational mathematics and fluid mechanics. Much of his work has been on hydrodynamic instability, aerodynamics/aeroacoustics, turbulence, kinetic theory based modelling/method, numerical analysis and computational method. Dr. Hui Xu is currently working on receptivity and instability of the boundary-layer transition stages and addressing the influences of free stream disturbance, wavy wall, surface imperfections, blowing and suction, external acoustic waves on instability of a boundary layer. He is also working on high-precision spectral element method and applications.
His researches are/were mainly funded by EPSRC, Rolls-Royce, McLaren, Airbus, Renault and so on. He is working and collaborating with world-leading experts in the corresponding research fields. His research papers were mainly published in Journal of Fluid Mechanics, SIAM Journal on Scientific Computing, Journal of Computational Physics, Journal of Scientific Computing, International Journal for Numerical Methods in Engineering and so on.