Results 111 to 120 of about 6,551 (166)
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Technical Physics Letters, 1997
A new type of propagating perturbations on a vortex filament-traveling vortex breakdown-has been observed experimentally. A method of controlled external action on a vortex flow with known parameters is used. Data are obtained on the absolute propagation velocity of the perturbations as a function of the conditions in the vortex chamber, which ...
S. V. Alekseenko, S. I. Shtork
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A new type of propagating perturbations on a vortex filament-traveling vortex breakdown-has been observed experimentally. A method of controlled external action on a vortex flow with known parameters is used. Data are obtained on the absolute propagation velocity of the perturbations as a function of the conditions in the vortex chamber, which ...
S. V. Alekseenko, S. I. Shtork
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Fluid Dynamics, 1995
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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The Physics of Fluids, 1969
The Navier-Stokes equations for incompressible rotationally symmetric vortex flow at high swirl and large core Reynolds number are shown to approximate to the equation of inviscid rotating flow in regions where axial gradients are large. This equation becomes linear for flow originally near the axis, where rigid rotation results from viscous action ...
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The Navier-Stokes equations for incompressible rotationally symmetric vortex flow at high swirl and large core Reynolds number are shown to approximate to the equation of inviscid rotating flow in regions where axial gradients are large. This equation becomes linear for flow originally near the axis, where rigid rotation results from viscous action ...
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Supersonic vortex breakdown during vortex/cylinder interaction
Journal of Fluid Mechanics, 1998The head-one interaction of a supersonic streamwise vortex with a circular cylinder reveals a vortex breakdown similar in many ways to that of incompressible vortex breakdown. In particular, the dramatic flow reorganization observed during the interaction resembles the conical vortex breakdown reported by Sarpkaya (1995) at high Reynolds number.
Kalkhoran, IM, Smart, MK, Wang, FY
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Two-Vortex Models for Vortex Breakdown
ASME 2008 Dynamic Systems and Control Conference, Parts A and B, 2008A simple Hamiltonian dynamical systems model for vortex breakdown of the bubble-type (B-type) is developed and analyzed. This model is constructed using the flow induced by two point vortices moving in a half-plane immersed in an ideal (= inviscid and incompressible) fluid with an ambient uniform horizontal velocity.
Blackmore, D. +2 more
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An experimental investigation into vortex breakdown and vortex breakdown control
2021This thesis was scanned from the print manuscript for digital preservation and is copyright the author. Researchers can access this thesis by asking their local university, institution or public library to make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
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Physics of Fluids, 1995
Reported herein is a cone-shaped turbulent vortex breakdown in noncavitating swirling flows at high Reynolds numbers in a slightly diverging cylindrical tube. The turbulent conical form is in addition to the well-known double-helix, spiral, and nearly axisymmetric or ‘‘bubble’’-type breakdowns.
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Reported herein is a cone-shaped turbulent vortex breakdown in noncavitating swirling flows at high Reynolds numbers in a slightly diverging cylindrical tube. The turbulent conical form is in addition to the well-known double-helix, spiral, and nearly axisymmetric or ‘‘bubble’’-type breakdowns.
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Simple numerical criterion for vortex breakdown
AIAA Journal, 1992Vortex breakdown is currently identified in numerical flow solutions through postprocessing techniques. Although these methods can identify breakdown accurately, they can involve cumbersome data transfer and processing that can be quite time consuming. Therefore, a simple Rossby number criterion is proposed. The criterion is established using solutions
Robinson, B. A. +2 more
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Disrupted states of vortex flow and vortex breakdown
The Physics of Fluids, 1977Flow visualization studies and laser Doppler anemometer measurements on swirling water flows reveal six distinct types of very large amplitude disturbance modes of the vortex core. Three, ’’axisymmetric’’ and spiral vortex breakdowns, and the ’’double helix,’’ have been described by others.
J. H. Faler, S. Leibovich
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Progress in Aerospace Sciences, 1994
Abstract Vortex breakdown is of primary importance in many situations met in aeronautical as well as extra-aeronautical applications. During the past 40 years, this problem has been the subject of a large number of investigations, both in the experimental and theoretical domains.
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Abstract Vortex breakdown is of primary importance in many situations met in aeronautical as well as extra-aeronautical applications. During the past 40 years, this problem has been the subject of a large number of investigations, both in the experimental and theoretical domains.
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