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
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