Wake-foil interactions and energy harvesting efficiency in tandem oscillating foils

IB–LBM Based High Energy Harvesting Efficiency Prediction of Two Parallel Oscillating Foils

The flapping foil energy harvester is a promising alternative to traditional rotary turbines for power generation in currents. In order to investigate the energy harvesting performance and interaction mechanism of two parallel–arranged flapping foils, a systematic numerical study is conducted using the immersed boundary–lattice Boltzmann method (IB–LBM). Two parameters, the relative gap and mot...

Passive flexibility effect on oscillating foil energy harvester

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Shape of retracting foils that model morphing bodies controls shed energy and wake structure

Vortex-wake interactions of a flapping foil that models animal swimming and flight.

The fluid dynamics of many swimming and flying animals involves the generation and shedding of vortices into the wake. Here we studied the dynamics of similar vortices shed by a simple two-dimensional flapping foil in a soap-film tunnel. The flapping foil models an animal wing, fin or tail in forward locomotion. The vortical flow induced by the foil is correlated to (the resulting) thickness va...

Wake Structure and Performance of Finite Aspect-Ratio Flapping Foils

Most wings and fins found in nature tend to be of low or moderate aspect-ratio. However, most experimental and numerical studies in this area of bio-hydrodynamics have focused on examining large or infinite aspect-ratio flapping foils. In the current study, an efficient, finite-difference based immersed boundary solver for computing flows with moving immersed boundaries has been developed to ex...