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In general, vortex lines (in particular, the axis line) are either closed loops or end at the boundary of the fluid. A whirlpool is an example of the latter, namely a vortex in a body of water whose axis ends at the free surface. A vortex tube whose vortex lines are all closed will be a closed torus-like surface.
A vortex beam can be deformed into its characteristic lobe structure while passing through a tilted lens. This happens as a result of a self-interference between different phase points in a vortex. A vortex beam of order l will be split into n = l + 1 lobes, roughly around the depth of focus of a tilted convex lens. Furthermore, the orientation ...
The dark area hidden by the coronagraph mask can be seen on the images, though a bright dot has been added to show where the star would have been. Direct image of exoplanets around the star HR8799 using a vector vortex coronagraph on a 1.5 m portion of the Hale Telescope
Image from Cursus seu Mundus ... is the vector sum of the physical forces acting on the ... the Coriolis effect may indeed determine the direction of the vortex.
Direct image of exoplanets around the star HR8799 using a vortex coronograph on a 1.5m portion of the Hale Telescope. A vortex coronagraph is a type of optical instrument for telescopes that blocks out the glare of bright objects (like stars) so that smaller objects near them can be seen. For example, extrasolar planets near their host star as ...
In fluid dynamics, the Lamb–Oseen vortex models a line vortex that decays due to viscosity. This vortex is named after Horace Lamb and Carl Wilhelm Oseen. [1] [2] Vector plot of the Lamb–Oseen vortex velocity field. Evolution of a Lamb–Oseen vortex in air in real time. Free-floating test particles reveal the velocity and vorticity pattern.
One of these five methods is by Sujudi & Haimes (1995): in a velocity field v(x,t) a vector x lies on a vortex core line if v(x,t) is an eigenvector of the tensor derivative (,) and the other – not corresponding – eigenvalues are complex.
This is an accepted version of this page This is the latest accepted revision, reviewed on 19 January 2025. Computer graphics images defined by points, lines and curves This article is about computer illustration. For other uses, see Vector graphics (disambiguation). Example showing comparison of vector graphics and raster graphics upon magnification Vector graphics are a form of computer ...