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Topological Features of a Compressible Plasma Vortex Sheet - a Model of the Outer Heliospheric Wind
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The Voyager and Pioneer Spacecraft have detected large-scale quasi-periodic plasma fluctuations in the outer heliosphere beyond 20 AU. A plasma vortex sheet model can explain these fluctuations and the observed correlations between various physical variables. The large scale outer heliosphere is modeled by solving the 3-D compressible magnetohydrodynamic equations involving three interacting shear layers. Computations were done on a Cray computer at the NASA Center for Computational Sciences. Six cases are animated: Weak magnetic field and strong magnetic field, each at three values of tau, the vortex street characteristic time. Contours of density are shown as dark transparent 'tubes'. Critical points of the velocity field are represented by 'Glyphs'. Vortex cores are shown in orange and blue.
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A narrated video describing the results of the plasma vortex street model
Duration: 8.2 minutes
Available formats:
352x240 (29.97 fps)
MPEG-1
82 MB
160x80
PNG
21 KB
320x238
JPEG
9 KB
80x40
PNG
6 KB
How to play our movies
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| Animation Number: | 9 |
| Completed: | 1993-12-17 |
| Animator: | Cindy Starr (GST) (Lead) |
| Scientists: | Edouard Siregar (NASA/GSFC) |
| | Sanjoy Ghosh (NASA/GSFC) |
| Series: | Vortex Street |
| Video: | SVS1993-0001 * |
Keywords:
SVS
>> Heliosphere
SVS
>> Instability
SVS
>> Plasma
DLESE
>> Space science
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| Science paper: | Siregar, E., D. A. Roberts, and M. L. Goldstein, Quasi-periodic transverse plasma flow associated with an evolving MHD vortex street in the outer heliosphere, J. Geophys. Res., 98, 13, 233, 1993. |
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Please give credit for this item to:
NASA/Goddard Space Flight Center
Scientific Visualization Studio |
*Please note: the SVS does not fulfill requests for copies of the tapes in our library. On some of our animation pages, there is a direct link to a video distribution service from which tapes, handled by the Public Affairs Office (PAO)/Goddard TV, including some of our animations may be ordered. General information on this service can be found here. |
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