Fluid Mechanics Webinars: Dwight Barkley talk video

Speaker: Dwight Barkley, University of Warwick, UK

Date/Time: Friday 12th June, 2020. 4:00pm BST/11am EDT

Title: Mechanisms and universality in the subcritical route to turbulence

Video: https://www.youtube.com/watch?v=mkvUraQL4N0

Abstract: Recent years have witnessed a profound change in our understanding of the route to turbulence in wall-bounded shear flows. In stark contrast to the classical Hopf-Landau picture where turbulence arises through an increase in the temporal complexity of fluid motion, the route to turbulence in subcritical shear flows occurs via spatio-temporal intermittency and falls in the class of non-equilibrium statistical phase transitions known as directed percolation. In this talk I will focus on two aspects of the transition problem. The first is physical mechanisms underlying spatio-temporal intermittency in shear flows. The second is the universality in the subcritical route to turbulence.