This study integrates high-speed photogrammetry, 3D surface reconstruction, and
computational fluid dynamics to explore a dragonfly (Erythemis Simplicicollis) in free flight …

To examine the effects of wing morphing on unsteady aerodynamics, deformable flapping
plates are numerically studied in a low-Reynolds-number flow. Simulations are carried out …

Insect wings can passively maintain a high angle of attack during each flapping stroke
without the aid of the active pitching motion due to the torsional flexibility of the wing basal …

The wake topology and propulsive performance of low-aspect-ratio plates undergoing a
pitching-rolling motion in a uniform stream were numerically investigated by an in-house …

Many natural flyers and swimmers routinely flex their lifting or propulsive surfaces to control
the leading-edge vortex (LEV) that forms on the suction side during maneuvering at a high …

Numerous large-scale wind turbines have been built in tropical cyclone zones in China
during the last decades. However, considerable failures of parked wind turbines have been …

The study of flapping-wing aerodynamics faces a large control space with different wing
kinematics and deformation. The adjoint-based approach, by solving an inverse problem to …

The computational cost of unsteady adjoint equations remains high in adjoint-based
unsteady aerodynamic optimization. In this letter, the solution of unsteady adjoint equations …

An adjoint-based optimization is applied to study the thrust performance of a pitching–rolling
ellipsoidal plate in a uniform stream at Reynolds number 100. To achieve the highest thrust …

We have developed a strong-coupling approach based on a uniformly-applied Eulerian
description for both fluid and solid and provided a simple monolithic formulation to compute …