Immersed boundary methods are extensively used for simulations of dynamic solid objects
interacting with fluids due to their computational efficiency and modeling flexibility compared …

As a canonical problem, the impulsive starting of a circular disk contains the fundamental
mechanisms of the force generation of the drag-based propulsions. In this paper, a circular …

Time-varying flow separation on an accelerating prolate spheroid has been studied at
various angles of incidence. Instantaneous pressure and scanning stereoscopic particle …

Acceleration of objects in fluids widely exists in biological propulsions and contains rich
unsteady fluid mechanisms. In this paper, the instantaneous drag force on accelerating …

Vortex rings have the ability to transport fluid over long distances. They are usually produced
by ejecting a volume of fluid through a circular orifice or nozzle. When the volume and …

The effects of edge undulation on separated flows and vortex formation are investigated with
various geometries of accelerated, low aspect-ratio propulsors. In addition to force …