Fluid flow control with transformation media

Details Fluid flow control with transformation media Fluid flow control with transformation media

2011-06-12

arxiv.org/abs/1106.2282v3

PRL 107, 074501 (2011)

Physics

Fluid Dynamics

4 pages, 7 figures

Scientific paper

10.1103/PhysRevLett.107.074501

We introduce a new concept for the manipulation of fluid flow around three-dimensional bodies. Inspired by transformation optics, the concept is based on a mathematical idea of coordinate transformations and physically implemented with anisotropic porous media permeable to the flow of fluids. In two situations - for an impermeable object placed either in a free-flowing fluid or in a fluid-filled porous medium - we show that the object can be coated with an inhomogeneous, anisotropic permeable medium, such as to preserve the flow that would have existed in the absence of the object. The proposed fluid flow cloak eliminates downstream wake and compensates viscous drag, hinting us at the possibility of novel propulsion techniques.

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