Transition to turbulence when the Tollmien–Schlichting and bypass routes coexist
Transition to turbulence when the Tollmien–Schlichting and bypass routes coexist
Plane Poiseuille flow, the pressure-driven flow between parallel plates, shows a route to turbulence connected with a linear instability to Tollmien–Schlichting (TS) waves, and another route, the bypass transition, that can be triggered with finite-amplitude perturbation. We use direct numerical simulations to explore the arrangement of the different routes to …