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On the stability of vortex rings

WebVolcanoes blow smoke rings and they do it rarely, because they require such precise conditions to form. This one is produced by Mount Etna on May 2nd, 2024 #Physics: Smoke rings are formed when a puff of smoke is expelled from a circular opening, creating a vortex ring of swirling air.The vortex ring is a stable, self-contained, toroidal structure … WebAbstract. We revisit the stability of an elliptically strained vortex and a thin axisymmetric vortex ring, embedded in an inviscid incompressible fluid, to three-dimensional disturbances of infinitesimal amplitude. The results of Tsai & Widnall (1976) for an elliptically strained vortex are simplified by providing an explicit expression for the ...

The structure and stability of vortex rings

Web12 de dez. de 2024 · 1.3 LITERATURE ON THE STABILITY OF VORTEX RINGS. The main instabilities of the ring are normally in the form of azimuthal waviness formed around the circumference of the ring that was initially laminar and stable. These waves then grow and in most cases, eventually lead to the ring collapsing in a turbulent blob. Web17 de dez. de 2015 · DOI: 10.2991/JIMET-15.2015.209 Corpus ID: 59484713; Influence of Structure Parameters and Velocity on Inflation Performance of Vortex Ring Parachute @inproceedings{Xiaodong2015InfluenceOS, title={Influence of Structure Parameters and Velocity on Inflation Performance of Vortex Ring Parachute}, author={Ma Xiaodong and … software lechero colombia https://usl-consulting.com

Active control of vortex shedding past finite cylinders under the ...

Web1 de nov. de 1993 · Accurate numerical simulations of vortex rings impinging on flat boundaries revealed the same features observed in experiments. The results for the impact with a free-slip wall compared very well with previous numerical simulations that used spectral methods, and were also in qualitative agreement with experiments. The present … WebExploratory measurements of the effect of a stable continuous vertical stratification on horizontally propagating vortex rings show that the rings are subject to a stratification induced instability and subsequent collapse, which forms a well mixed intrusion. For initial ring Froude numbersF 0=U 0/Nd 0=1.0–2.0, instability and collapse occurs when the … Web11 de abr. de 2013 · We also find solutions for the problem of three vortex rings, which describe both the regular and chaotic leapfrogging motion of vortex rings. ... A Note on … slow horses online

Vortex Rings SpringerLink

Category:Linear stability of a vortex ring revisited SpringerLink

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On the stability of vortex rings

The linear stability of swirling vortex rings - AIP Publishing

Webthe stability of a vortex ring in close proximity to another vortex ring. The analysis followed the approach used by Widnall & Sullivan (1973) for the long-wavelength … Web19 de mar. de 2024 · Abstract—The problem of stability of steady-state thin vortex ring flow in an ideal fluid is studied in the linear approximation. The case of the isochronous vortex ring in which the liquid-particle rotation periods are identical is considered. In such a flow there are no perturbations of the continuous spectrum. This makes considerably …

On the stability of vortex rings

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WebAbstract. We revisit the stability of an elliptically strained vortex and a thin axisymmetric vortex ring, embedded in an inviscid incompressible fluid, to three-dimensional … WebIn nature, vortex rings are found to occur in various shapes and sizes. Perhaps the most familiar example is the smoke-ring which is produced when cigarette smoke is... Skip to main ... Widnall, S. E. and Sullivan, J. P. 1973 On the stability of vortex rings. Proc. Roy. Soc. London A332, 335–353. ADS Google Scholar

WebThe stability of vortex rings is investigated both theoretically and experimentally. The theoretical analysis considers the stability of the vortex-filament ring of small but finite core size in an … Expand. 277. View 1 excerpt, references background; Save. Alert. WebDownload scientific diagram Model of a turbocharger with floating-bearing rings. The sketch on the right-hand side shows a cross-section through a bearing which features an oil-inlet groove in ...

Web27 de mar. de 1973 · Attention was also given to the stability of vortex rings at this time, with analytical (Widnall and Sullivan (1973), Widnall et al. (1974), Widnall and Tsai … WebThe work focuses on the problem of stability and viscous decay of single vortex rings. A tentative classification scheme is proposed for vortex rings which is based on extensive hot-wire measurements of velocity in the ring core and wake, and flow visualization, viz. laminar, wavy, turbulence-producing, and turbulent. Prediction of vortex ring type is …

WebIn nature, vortex rings are found to occur in various shapes and sizes. Perhaps the most familiar example is the smoke-ring which is produced when cigarette smoke is... Skip to …

WebThe structure and stability of vortex rings By T. MAXWORTHY Departments of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, … slow horses review apple tvWeb4 de set. de 2024 · It is shown that the vortex rings are subjected to curvature instability as predicted analytically by Blanco-Rodríguez & Le Dizès (J. Fluid Mech., vol. 814, 2024, … slow horses pdfWebA series of observations on experimentally produced vortex rings is described. The flow field, ring velocity and growth rate were observed using dye and hydrogen-bubble … slow horses ratingWeb13 de abr. de 2024 · To overcome this problem, vortex cut and vortex ring models can be used to handle the discontinuous potential on the toroidal bubble surface. In this work, we compare these two models applied to toroidal bubble dynamics in a free field and near a rigid wall in terms of bubble profile, bubble gas pressure, and dynamic pressure induced … software legacy grooveWeb29 de mar. de 2006 · Abstract. A series of observations on experimentally produced vortex rings is described. The flow field, ring velocity and growth rate were observed using dye … software leaseWeb29 de mar. de 2006 · Short-wave instabilities are discussed for both the vortex ring and the vortex pair. Instability for both the ring and the pair is predicted to occur whenever the … software lease calculatorWeb4 de jun. de 1998 · A joint experimental and computational methodology is developed and applied to investigate a vortex ring impinging normally on a wall. The method uses digital particle image velocimetry to make planar flow measurements, which are then used to initialize a second‐order finite difference calculation. The experiment and the simulation … software led monitor 38uc99