Results 251 to 260 of about 44,492 (300)

Vortex shedding in unsteady flow

Journal of Wind Engineering and Industrial Aerodynamics, 1983
Abstract Previous experiments by other workers have shown that when a cylinder vibrates in a steady flow the frequency of the vortex shedding from the cylinder can synchronize with the frequency of the cylinder's vibration. As a result the shedding frequency remains constant over a range of flow velocities, and the oscillatory forces acting on the ...
F.H. Barnes, I. Grant
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Vortex shedding-free strainers

Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 2011
The subject of the periodic vortex shedding behind bluff bodies, which exhibits oscillatory behaviour, is of direct relevance to many practical applications, e.g. pipelines and heat exchangers. Repetitive failures were occurring in associated piping components on the suction of a sales gas compressor.
Y Khulief, M A Habib, S A M Said, R Ben-Mansour, H M Badr, M Anis, A E Khalifa   +6 more
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The active control of vortex shedding

Journal of Fluids and Structures, 1989
This paper describes an active method of controlling vortex shedding from a circular cylinder at Reynolds number 400. The control was effected by an acoustic feedback of signals taken from hot-wires in the wake of the cylinder. The velocity fluctuation at the nominal vortex shedding frequency is reduced throughout the wake, in places by more than 30 ...
J.E. Ffowcs Williams, B.C. Zhao
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On the accurate calculation of vortex shedding

Physics of Fluids A: Fluid Dynamics, 1990
The issue of accuracy and convergence for numerical calculations in situations in which the exact solution of the Navier–Stokes equations (under the imposed initial and boundary conditions) is unstable is discussed. If one relies on roundoff error or truncation error (or the randomness of a stochastic scheme) in order to perturb the computed solution ...
Christopher R. Anderson, Claude Greengard, Leslie Greengard, Vladimir Rokhlin   +3 more
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On the mechanism of symmetric vortex shedding

Journal of Fluids and Structures, 2019
Abstract In this paper, we study the vortex-shedding mechanism of a square cylinder subjected to a mean flow with a superimposed pulsatile flow, under symmetric vortex shedding conditions. The near-body vortical events are interpreted in accordance with the two-dimensional vorticity transport equation, and the interactions between different vortical ...
Krishnan Hrisheekesh, Amit Agrawal, Atul Sharma, Mark C. Thompson, John Sheridan   +4 more
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Coupling of vortex shedding with a cavity

Fluid Dynamics Research, 1988
A pulsating flow within a tube with one end sealed and the other end open, facing a low-velocity wind tunnel flow, may be generated by using a wedge trip placed upstream of the open end of the tube. However, a reasonable explanation about the generating mechanism of the pulsating flow within the resonator coupled with a tripping device has not been ...
Masaaki Kawahashi, Eric Brocher, Paul Collini   +2 more
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Vortex shedding and the voice source

The Journal of the Acoustical Society of America, 2007
The voice source is primarily an acoustic dipole produced by the fluctuating drag on the vocal folds [Zhao, Zhang, Frankel et al., J. Acoust. Soc. Am. 112, 2134–2146 (2002)]. In this paper the unsteady drag is determined theoretically in terms of the vorticity shed from the vocal folds.
Michael S. Howe, Richard S. McGowan
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An Application of Vortex Shedding Flowmeters

Journal AWWA, 1977
After a study of available flowmetering devices, the Santa Clara Valley Wtr. Dist. installed insertion‐style vortex shedding meters in conjunction with its Penitencia water‐treatment plant and East Pipeline distribution main. The performance of these meters in a practical application in a treated water distribution system is discussed and evaluated in ...
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Vortex shedding in rotating flows

Geophysical & Astrophysical Fluid Dynamics, 1983
Abstract A rotating tow facility whose principle element is a long acrylic channel of rectangular cross-section has been developed. A smooth flexible belt, which can be translated along the channel axis, serves as a false horizontal floor. The system is mounted on a turntable which rotates at a constant angular speed about a vertical axis.
Don L. Boyer, Michael L. Kmetz
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An electrostatic vortex shedding meter

Flow Measurement and Instrumentation, 1990
Abstract The conventional vortex shedding flowmeter performs satisfactorily in the metering of many types of fluid, but the reliability of its sensor can be questionable when exposed to hostile environments. In this paper the standard piezoelectric sensor in a commercially available flowmeter was replaced by electrodes positioned within the flow tube.
J.L. Sproston, A. El-Wahed, M.W. Johnson
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