Vortex ring - Wikipedia
A vortex ring, also called a toroidal vortex, is a torus-shaped vortex in a fluid; that is, a region where the fluid mostly spins around an imaginary axis line that forms a closed loop. The dominant flow in a vortex ring is said to be toroidal , more precisely poloidal .
Toroidal vortices of light - Nature Photonics
2022年6月2日 · Toroidal vortices, also known as vortex rings, are whirling, closed-loop disturbances that form a characteristic ring shape in liquids and gases and propagate in a direction that is perpendicular...
Vortex - Wikipedia
Vortex rings are torus-shaped vortices where the axis of rotation is a continuous closed curve. Smoke rings and bubble rings are two well-known examples. The lifting force of aircraft wings , propeller blades, sails , and other airfoils can be explained by the creation of a vortex superimposed on the flow of air past the wing.
Toroidal phase topologies within paraxial laser beams
2024年8月24日 · also provides a toroidal vortex phase, although it is not located in a standard torus. Taking the parameter α = 1, β = 2 as an example, we will illustrate the observation of embedding toroidal...
Influence of winding number on vortex knots dynamics
2019年11月21日 · We prove that the winding number — a topological invariant of torus knots — has a primary effect on vortex motion. This is done by applying the Moore-Saffman desingularization technique to the...
Vortex (or vorticity) dynamics is concerned with the manner in which swirling flows evolve in fluids when viscous (i.e. internal friction) effects are relatively weak, and can be neglected in a first approximation.
Topological transition from superfluid vortex rings to isolated …
2020年12月16日 · In this paper, we propose a scheme to generate torus vortex knots and links through the reconnections of vortex rings perturbed by Kelvin waves in trapped Bose-Einstein condensates, which makes it possible to generate topologically complex structures from topologically trivial objects controllably.
Superfluid vortex dynamics on a torus and other toroidal surfaces …
2020年5月4日 · In this work, we study the dynamics of a superfluid film on the surface of a torus. Such a compact surface allows only configurations of vortices with zero net vorticity. We derive analytic expressions for the flow field, the total energy, and the …
Observation of optical vortex knots and links associated with ...
We experimentally generated a series of related optical vortex torus topologies, and furthermore, observed the evolution process of the 3D topological structure of light field. The results well demonstrated the transformation process between optical vortex knots and links only by changing the topological charge.
Point vortex interactions on a toroidal surface
In the case of the flat torus, the vortex dipole drifts along its geodesic at a constant speed as a pair. The other is the motion of identical point vortices with the same vortex strengths. When they are considered in the flat torus, they are co-rotating around their centre point without changing their relative distance.
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