24 June 2019
The 107th ZJU Global Lecture was held on 21th June in Zijingang Campus. Academician of Australian Academy of Science Prof. Ivan Marusic was invited to give a lecture on High Reynolds Number Wall Turbulence. Prof. Ivan Marusic is ARC laureate research fellow and Redmond Barry distinguished professor of the Department of Mechanical Engineering at the University of Melbourne. His main research includes experimental and theoretical studies on turbulence under high Reynolds number, including studies on atmospheric surface currents and aquatic ecosystems.
Prof. Ivan Marusic said a key consideration in the characterization of the mechanics of turbulent flows is to understand the generation, evolution and interactions of the large-scale structures and the range of eddying motions that make up the turbulent flow. The non-linearity of these processes makes the problem very challenging, both computationally and experimentally. This is particularly true in wall-bounded flows where an increasing hierarchy of energy-containing eddy scales exists with increasing Reynolds number.
In this talk he reviewed recent studies by their group in high Reynolds number flow facilities and from the atmospheric surface layer documenting unique high Reynolds number phenomena in wall turbulence. The focus will be the logarithmic region, looking at issues regarding its universality, coherent structures and how they interact across the boundary layer. The effects of rough surfaces will also be considered. The lecture aroused a heated discussion between teachers and students.
