Unsteady Vortex Flows: Analysis and Modelling

This lecture focuses on data-driven analysis and modelling of unsteady vortex-dominated flows, covering topics such as vortex formation, trajectory, growth, and timing. It also discusses dynamic stall phenomena, separation control, and optimisation strategies. The instructor presents research findings on the temporal evolution of shear layer roll-up, primary and secondary vortices shedding, and dynamic stall delay. The lecture concludes with a study on the optimisation of flapping wing kinematics for efficient flight through parameter space, including the use of deformable wings. Various empirical time constants and scaling parameters are discussed, along with the implications for force response in unsteady flow conditions.