Results 201 to 210 of about 7,498 (257)

Large-gap cascaded Moiré metasurfaces enabling switchable bright-field and phase-contrast imaging compatible with coherent and incoherent light. [PDF]

Nanophotonics
Li Y, Zhou W, Zhang Y, Huang X, Chen Y, Yuan M, Yang J.   +6 more
europepmc   +1 more source

Butterfly Clap-Fling Flight Mechanisms Observed by Schlieren Imaging for the Design of Bio-Inspired Micro Air Vehicles. [PDF]

Biomimetics (Basel)
Prisăcariu EG, Strătilă S, Dumitrescu O, Sima M, Roșu RA, Vlăducă I.   +5 more
europepmc   +1 more source

Quantum coherent manipulation and readout of superconducting vortex states. [PDF]

Nature
Nambisan A, Günzler S, Rieger D, Gosling N, Geisert S, Carpentier V, Zapata N, Field M, Milošević MV, Lopez CAD, Padurariu C, Kubala B, Ankerhold J, Wernsdorfer W, Spiecker M, Pop IM.   +15 more
europepmc   +1 more source

Research on the Design of Micromixer Based on Acoustic Streaming-Driven Sharp-Edge Structures. [PDF]

Sensors (Basel)
Bai K, Qiao H, Cai J, Hu J, Wang Z.
europepmc   +1 more source

The leading-edge vortex of yacht sails [PDF]

Ocean Engineering, 2018
In the present work we experimentally verify, for the first time, that a stable Leading-Edge Vortex (LEV) can be formed on an asymmetric spinnaker, which is a high-lift sail used by yachts to sail downwind. We tested a rigid sail in isolation in a water flume at a Reynolds number of ca. 104.
Abel Arredondo-Galeana, Ignazio Maria Viola   +1 more
exaly   +6 more sources

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Lift and the Leading Edge Vortex

50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2012
AbstractFlapping wings often feature a leading-edge vortex (LEV) that is thought to enhance the lift generated by the wing. Here the lift on a wing featuring a leading-edge vortex is considered by performing experiments on a translating flat-plate aerofoil that is accelerated from rest in a water towing tank at a fixed angle of attack of 15°.
Pitt Ford, C. W., Babinsky, H.
openaire   +2 more sources

Leading-Edge Vortex Lifts Swifts

Science, 2004
The current understanding of how birds fly must be revised, because birds use their hand-wings in an unconventional way to generate lift and drag. Physical models of a common swift wing in gliding posture with a 60° sweep of the sharp hand-wing leading edge were tested in a water tunnel.
Videler, J. J., Stamhuis, E. J., Povel, G. D. E.   +2 more
openaire   +2 more sources

Vortex–leading-edge interaction

Journal of Fluid Mechanics, 1982
Visualization of successive vortices impinging upon the leading edge of a wedge reveals patterns of deformation of each incident vortex; for certain offsets of the edge with respect to the incident vortex there is pronounced vortex shedding from the leading edge, whereby the shed vortex has a vorticity orientation opposite to that of the incident ...
Samir Ziada, Donald Rockwell
openaire   +1 more source

Leading-edge vortex stability in insect wings

Physical Review E, 2005
An analytical study is presented to determine if the persistency of the leading-edge vortex in an insect wing can be explained as the balance between vorticity generation at the leading edge and advection plus effects of vorticity stretching and tilting by the flow along the wing span.
F O, Minotti, E, Speranza
openaire   +2 more sources