Wake interference effects on flapping dynamics of elastic inverted foil

This study examines how the unsteady wake from an upstream stationary cylinder impacts the flapping response of an elastic inverted foil. Through high-fidelity simulations, we identify a critical nondimensional bending rigidity above which wake interference effects result in distinct flapping dynamics governed by stiffness and mass ratio. Additionally, we propose a nondimensional parameter that captures the interplay between inertia and elasticity, offering insights into fluid-structure interactions with implications for renewable energy harvesting systems.