wingtip vortex

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• Wingtip vortices — are tubes of circulating air which are left behind by the wing as it generates lift. One wingtip vortex trails from the tip of each wing. The cores of vortices spin at very high speed and they are regions of very low pressure. The cores of… …   Wikipedia

• Vortex — A vortex (pl. vortices ) is a spinning, often turbulent, flow of fluid. Any spiral motion with closed streamlines is vortex flow. The motion of the fluid swirling rapidly around a center is called a vortex. The speed and rate of rotation of the… …   Wikipedia

• Wingtip device — Infobox Aviation name = Wingtip devices caption = The winglet and red navigation light on the port (left) wing of a South African Airways Boeing 747 400Wingtip devices are usually intended to improve the efficiency of fixed wing aircraft.… …   Wikipedia

• Vortex dynamics — In 1858 Hermann von Helmholtz published his seminal paper entitled Über Integrale der hydrodynamischen Gleichungen, welche den Wirbelbewegungen entsprechen, in Journal für die reine und angewandte Mathematik , vol. 55, pp.25 55. So important was… …   Wikipedia

• Rankine vortex — The Rankine vortex model is an attempt to describe the velocity profile through vortices in real, viscous, fluids. It is named after its creator, William John Macquorn Rankine.A swirling flow in a viscous fluid is characterized by a forced vortex …   Wikipedia

• Lift-induced drag — In aerodynamics, lift induced drag, induced drag, vortex drag, or sometimes drag due to lift, is a drag force that occurs whenever a moving object redirects the airflow coming at it. This drag force occurs in airplanes due to wings or a lifting… …   Wikipedia

• Tourbillon marginal — Traces de condensation dues au tourbillon marginal aux extrémités des ailes d un F 15E après un ravitaillement en vol Le tourbillon marginal (en anglais wingtip vortex ou au pluriel wingtip vortices) est le tourbillon qui se crée à l extrémité d… …   Wikipédia en Français

• Tourbillons marginaux — Tourbillon marginal Traces de condensation dues au tourbillon marginal aux extrémités des ailes d un F 15E après un ravitaillement en vol Le tourbillon marginal (en anglais wingtip vortex ou au pluriel wingtip vortices) est le tourbillon qui se… …   Wikipédia en Français

• Collective animal behavior — Sort sol. Starling flock at sunset in Denmark Collective animal behavior describes the coordinated behavior of large groups of similar animals and the emergent properties of these groups. Facets of this topic include the costs and benefits of… …   Wikipedia

• Contrail — Vapor Trail redirects here. For other uses, see Vapor Trail (disambiguation). For other uses, see Contrail (disambiguation). Cirrus aviaticus Contrails from a S7 Airlines Tupolev Tu 154M …   Wikipedia

• Helmholtz's theorems — In fluid mechanics, Helmholtz s theorems describe the three dimensional motion of fluid in the vicinity of vortex filaments. These theorems apply to inviscid flows and flows where the influence of viscous forces is small and can be… …   Wikipedia