Collective motion of organisms is a widespread phenomenon exhibited by many species,
most commonly associated with colonial birds and schools of fish. The benefits of schooling …

Inspired from deformable caudal fins, continuous bending motion is utilized to improve the
propulsive performance of flapping foils for underwater vehicles. The propulsive …

The flapping wings or fins in an in-line arrangement are a common scene in flocks and
schools, as well as flying creatures with multiple pairs of wings, eg, dragonflies …

In nature, the phenomenon of cluster movements of fish, birds, and insects is universal,
which constantly inspires people to explore its advantages. In this study, the aerodynamic …

In nature, insects with their forewings and hindwings undergoing small-gap flapping motion
experience strong aerodynamic interaction. Conventional studies mainly focus on the …

Tuna, which are known for high-performance swimming, possess a large crescent dorsal fin
(DF) and a caudal fin (CF) that differ from those of other fishes. The hydrodynamic interaction …

We report direct numerical simulations of a pair of wings in horizontal tandem configuration
to analyze the effect of their aspect ratio on the flow and the aerodynamic performance of the …

The combined ceiling and ground effect on the aerodynamics of a hovering flapping wing is
investigated using numerical simulations. In the simulations, the wing was located between …

We report direct numerical simulations of the flow around a spanwise-flexible wing in
forward flight. The simulations were performed at but different aspect ratio have the same …

Flapping foils have been widely studied with the aim of achieving improved self-propelling
efficiency and developing a new type of energy harvester. This study investigated the …