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Karman vortex streets in wakes of islands.
AIAA Journal, 1965W satellites equipped with narrow-angle cameras have revealed the existence of mesoscale eddies, which are on a scale too small to be delineated by the standard weather observation network and are too large to be seen by an observer on the ground or even pictured from a high-flying aircraft.
K. CHOPRA, L. HUBERT
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Dynamics and Stability of Systems, 1987
Karman's family of point vortex streets is unstable for all aspect ratios, being linearly stable for only a single value of aspect ratio. This property has been reported to hold for some more complicated families of vortex streets. It is proved here that all one-parameter families of two-dimensional inviscid x-periodic equilibrium vortex systems ‘close
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Karman's family of point vortex streets is unstable for all aspect ratios, being linearly stable for only a single value of aspect ratio. This property has been reported to hold for some more complicated families of vortex streets. It is proved here that all one-parameter families of two-dimensional inviscid x-periodic equilibrium vortex systems ‘close
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Journal of Fluid Mechanics, 1967
The flow in the wake of a two-dimensional blunt-trailing-edge body was investigated in the Reynolds number range, Reynolds number being referred to base height, 1·3 × 104 to 4·1 × 104. The effects of splitter plates and base bleed on the vortex street were examined. Measurements were made of the longitudinal spacing between vortices and the velocity of
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The flow in the wake of a two-dimensional blunt-trailing-edge body was investigated in the Reynolds number range, Reynolds number being referred to base height, 1·3 × 104 to 4·1 × 104. The effects of splitter plates and base bleed on the vortex street were examined. Measurements were made of the longitudinal spacing between vortices and the velocity of
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Mechanism underlying Kármán vortex street breakdown preceding secondary vortex street formation
Physics of Fluids, 2016The Kármán street that develops behind a bluff body transforms in the far wake into a secondary vortex street of lower frequency and stronger vortices. Before this transformation, the primary street decays. This interesting phenomenon was investigated in a number of experimental and theoretical studies.
G. Ya. Dynnikova +2 more
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Journal of Geophysical Research: Space Physics, 1990
This paper presents the hypothesis that the periodic meridional (north–south) flows observed by Voyager 2 in the neighborhood of 20–25 AU were produced by a heliospheric vortex street. The separation of the vortices was approximately 6 AU in the radial direction, and the vortices were carried away from the sun at a speed of approximately 425 km/s. This
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This paper presents the hypothesis that the periodic meridional (north–south) flows observed by Voyager 2 in the neighborhood of 20–25 AU were produced by a heliospheric vortex street. The separation of the vortices was approximately 6 AU in the radial direction, and the vortices were carried away from the sun at a speed of approximately 425 km/s. This
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1960
Publisher Summary The phenomenon of periodic vortex shedding from a symmetrical bluff body and the formation of the vortices in a street have been the concern of experimenters and theoreticians for 50 years. Meanwhile, new contributions have added further facets to our subject matter, and some of the older work has achieved new importance ...
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Publisher Summary The phenomenon of periodic vortex shedding from a symmetrical bluff body and the formation of the vortices in a street have been the concern of experimenters and theoreticians for 50 years. Meanwhile, new contributions have added further facets to our subject matter, and some of the older work has achieved new importance ...
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On the origin of the secondary vortex street
Journal of Fluid Mechanics, 2012AbstractThe origin of the secondary vortex street, observed in the far wake in the flow past a circular cylinder, is investigated. The Reynolds number, based on the diameter of the cylinder, is 150. The von Kármán vortex street, which originates in the near wake, decays exponentially downstream of the cylinder.
Kumar, Bhaskar, Mittal, Sanjay
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1995
Abstract One of the most surprising results from the plasma experiment on Voyager 2 is the discovery of a quasi-periodic meridional flow with a period of about 25.5 days between 20 AU and 25 AU from 1986 to early 1988 (Lazarus and Belcher, 1988; Lazarus et al., 1988; Lazarus and McNutt, 1990).
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Abstract One of the most surprising results from the plasma experiment on Voyager 2 is the discovery of a quasi-periodic meridional flow with a period of about 25.5 days between 20 AU and 25 AU from 1986 to early 1988 (Lazarus and Belcher, 1988; Lazarus et al., 1988; Lazarus and McNutt, 1990).
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On cell formation in vortex streets
Journal of Fluid Mechanics, 1991A simple, phenomenological model is proposed for the formation of spanwise cells behind slender bodies of revolution in crosswise, uniform or non-uniform oncoming flow. The model yields estimates for the position of the cells, their frequencies, their amplitudes of oscillation along the span, and the local shedding angle.
Bernd R. Noack +2 more
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