Midwest Mechanics Seminar Series

Fluid flows subject to time-dependent external forces or boundary conditions are ubiquitous in aeronautical applications. Whether one considers pitching wings, dynamic stall or the gust response of wind turbines, the flow is unsteady or non-autonomous. We investigate the influence of unsteadiness on the non-linearflow evolution, as well as on the linear response to small disturbances that determines their stability and the subsequent transition to turbulence.