Low-frequency unsteadiness in turbulent separation bubbles

Abstract:  Turbulent separation bubbles - confined regions of separated flow near a solid surface – are known to exhibit velocity and pressure fluctuations in wide a range of time scales. In this talk we will specifically consider their large-scale, low-frequency behavior, which has drawn significant interest from the research community in the past few years. We will describe the low-frequency unsteadiness in both low-speed and high-speed flows, explain our current understanding of the phenomenon based on linear analysis, and discuss future avenues of research on the topic.

Bio: Julien Weiss is Professor of Aerodynamics at the Technical University of Berlin. He holds a M. Sc. from ENSMA Poitiers and a Ph.D. from the University of Stuttgart. Before joining TU Berlin, he gained experience as an engineer at Alstom Power and Bombardier Aerospace. He also worked as a postdoc at the NASA Langley Research Center and started his academic career at the University of Québec.