Results 151 to 160 of about 56,251 (190)
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19th AIAA, Fluid Dynamics, Plasma Dynamics, and Lasers Conference, 1987
In this paper, steady, axisymmetric inviscid, and viscous (laminar) swirling flows representing vortex breakdown phenomena are simulated using a stream function-vorticity-circulation formulation and two numerical methods. The first is based on an inverse iteration, where a norm of the solution is prescribed and the swirling parameter is calculated as a
M. HAFEZ +3 more
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In this paper, steady, axisymmetric inviscid, and viscous (laminar) swirling flows representing vortex breakdown phenomena are simulated using a stream function-vorticity-circulation formulation and two numerical methods. The first is based on an inverse iteration, where a norm of the solution is prescribed and the swirling parameter is calculated as a
M. HAFEZ +3 more
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18th Fluid Dynamics and Plasmadynamics and Lasers Conference, 1985
A vortex breakdown was simulated by the vortex filament method, and detailed figures are presented based on the results. Deformations of the vortex filaments showed clear and large swelling at a particular axial station which implied the presence of a recirculation bubble at that station.
Y. NAKAMURA, A. LEONARD, P. SPALART
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A vortex breakdown was simulated by the vortex filament method, and detailed figures are presented based on the results. Deformations of the vortex filaments showed clear and large swelling at a particular axial station which implied the presence of a recirculation bubble at that station.
Y. NAKAMURA, A. LEONARD, P. SPALART
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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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Progress in Energy and Combustion Science, 2001
Abstract This paper reviews the studies undertaken on vortex breakdown over the past 45 years. The paper is structured such that the area is considered in three sections — experimental, numerical and finally theoretical, and provides a ‘guide’ to the literature and where necessary directs the reader to more indepth reviews in the specific areas.
O Lucca-Negro, T O'Doherty
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Abstract This paper reviews the studies undertaken on vortex breakdown over the past 45 years. The paper is structured such that the area is considered in three sections — experimental, numerical and finally theoretical, and provides a ‘guide’ to the literature and where necessary directs the reader to more indepth reviews in the specific areas.
O Lucca-Negro, T O'Doherty
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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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