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Starting vortex
About: Starting vortex is a research topic. Over the lifetime, 4785 publications have been published within this topic receiving 100419 citations.
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TL;DR: In this article, the authors examined the evolution of a primary vortex street shed from a circular cylinder in the far wake for 70 < R < 154 (R is the Reynolds number).
38 citations
TL;DR: A review on the dynamics of vortices in fluids which get involved in aircraft wakes is presented in this paper, where the authors use the concepts useful to appraise their dynamics are: inertial waves, 3D instabilities due to vortex interaction, vortex merging, vortex breakdown and turbulence.
38 citations
TL;DR: In this paper, a particle image velocimetry (PIV) was used to investigate the effect of quick-pitch motions on the trailing-edge vortex circulation of an airfoil undergoing harmonic plunging superimposed with a pitching motion near the bottom of the stroke.
38 citations
TL;DR: In this article, two models for the motion of a line vortex near a gap in an infinitely long straight barrier are presented, one based on conformal mapping and the numerical method of contour surgery.
Abstract: Two models are presented for the motion of a vortex near a gap in an infinitely long straight barrier: a problem of geophysical significance. The first model considers a line vortex for which the trajectories are obtained analytically and are generalized to include simple ambient flows. The criterion determining whether in the absence of background flow a vortex originating far from the gap passes through or leaps across the gap is derived. The second model considers a finite area patch of constant vorticity and is based on conformal mapping and the numerical method of contour surgery. The two models enable a comparison of the trajectories of line vortices and vortex patches. In most examples the centroid of the patch is constrained to follow closely the trajectory of a line vortex of the same circulation. An exception occurs when flow through the gap forces the vortex patch close to one of the edges of the barrier where it splits into two with only one part of the vortex passing through the gap.
38 citations
TL;DR: In this article, the influence of steep bottom topography on the propagation of a vortex in a two-layer quasigeostrophic model is investigated, and it is shown that steep topography can scatter disturbances created by the upper-layer vortex displacement and maintain the lower-layer motion weak.
Abstract: The authors investigate the influence of steep bottom topography on the propagation of a vortex in a two-layer quasigeostrophic model. The vortex is intensified in the upper layer and the planetary beta effect is taken into account. The authors find that steep topography can scatter disturbances created by the upper-layer vortex displacement and maintain the lower-layer motion weak. It is thus shown that, when the vortex radius is smaller than a critical value, the vortex behaves as if the lower layer was at rest (or infinitely deep as in a reduced gravity model). If the radius is increased while holding the maximum vorticity of the vortex, the topographic Rossby waves—generated during the scattering process—have a stronger signature in the upper layer, and the vortex evolution begins to change in comparison with the reduced-gravity case. However, numerical experiments show that both the steep topography and reduced-gravity trajectories remain close up to a large radius, after which a vortex abov...
38 citations