On the stability of vortex rings

Author: bqhi

August undefined, 2024

WebThe circulation of a steady vortex ring ζis given by 1 2π Z R3 ζ(x)dx. A steady vortex ring ζis said to be centralized if ζis symmetric non-increasing in z, namely, ζ(r,z) = ζ(r,−z), and … 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 …

On the Stability of Vortex Rings - JSTOR Home

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 … 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 the Stability of a Vortex Ring of Small … church view farm eggs wakefield

On the Stability of Vortex Rings - NASA/ADS

Web13 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 … Web4 de jun. de 1998 · Ring vortex evolution, from the initial roll‐up phase through to the final turbulent phase, was experimentally studied to see the dependence of its stirring properties on both the initial (accelerating, constant, decelerating, slow, fast) piston motion as well as on the boundary (tube/hole geometry) conditions. Stirring between fluid initially … WebOn the stability of vortex rings By SHEILA E. WIDNALL AND J. P. SULLIVAN Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, … dfb tickethotline

Linear stability of a vortex ring revisited SpringerLink

The structure and stability of vortex rings Semantic Scholar

WebThe solution to 0 (e 2) is presented, although the details of the stability analysis are carried through completely only for a special class of bending waves that are known to be … 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. 275. View 1 excerpt, references background; Save. Alert. Related Papers. Showing 1 through 3 of 0 Related Papers. church view farm lydiate churchview flowers castleblayney

"WebWidnall, S. & Sullivan, J. I973 On the stability of vortex rings. Proc. R. Soc. Lond. A 332, 335. Yuen, H. C. 1974 The stability of a vortex ring with axial flow, buoyancy forces and … " - On the stability of vortex rings

On the stability of vortex rings

Strings, vortex rings, and modes of instability - ScienceDirect

Web29 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 … 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

Did you know?

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 … Web29 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 …

WebThis 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 ... Web21 de nov. de 2016 · The stability of vortex rings with an azimuthal component of velocity is investigated numerically for various combinations of ring wavenumber and swirl magnitude. The vortex rings are equilibrated from an initially Gaussian distribution of azimuthal vorticity and azimuthal velocity, at a circulation-based Reynolds number of 10 …

Web10 de mar. de 2005 · The stability of vortex rings is investigated both theoretically and experimentally. The theoretical analysis considers the stability of the vortex-filament … 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 inviscid fluid to small sinusoidal displacements of its centreline.

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.

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. churchview farm apartments greensboro ncWebExploratory 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 … dfb tickets mainzWebVolcanoes 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 … church view farm thaxtedWeb10 de nov. de 2024 · The vortex rings are equilibrated from an initially Gaussian distribution of azimuthal vorticity and azimuthal velocity, at a circulation-based Reynolds number of 10 000, to a state in which the ... dfb ticketcenterWebAbstract. We revisit the stability of an elliptically strained vortex and a thin axisymmetric vortex ring, embedded in an inviscid incompressible fluid, to three-dimensional … churchview farms greensboro ncWeb17 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 … churchview farms baldwinWebDownload 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 ... dfb torwarttrainer lehrgang