Vortex shedding and hovering of a rigid body in an oscillating flow

Details Vortex shedding and hovering of a rigid body in an oscillating flow Vortex shedding and hovering of a rigid body in an oscillating flow

2009-10-16

arxiv.org/abs/0910.3247v1

Physics

Fluid Dynamics

Scientific paper

The fluid dynamics video shows rigid, spatially asymmetric bodies interacting with oscillating background flows. A free rigid object, here a hollow "pyramid," can hover quite stably against gravity in the oscillating airflow with a zero mean, when its peak speed is sufficiently high. We further show in shadowgraph imaging how this asymmetric body sheds vortices in such an unsteady flow, thus enabling the body to "ratchet" itself through the background flow.

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