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| Titel |
Spatial transport and spectral transfer of solar wind turbulence composed of Alfvén waves and convective structures II: numerical results |
| VerfasserIn |
J. M. Schmidt |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 13, no. 5 ; Nr. 13, no. 5, S.475-493 |
| Datensatznummer |
250011846
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| Publikation (Nr.) |
 copernicus.org/angeo-13-475-1995.pdf |
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| Zusammenfassung |
| This work follows the paper titled
"Spatial transport and spectral transfer of solar wind turbulence composed
of Alfvén waves and convective structures I: The theoretical model", and
deals with the detailed physics and numerical solution of a two-component solar
wind model, consisting of small-scale Alfvén waves and convected structures. In
particular, we present numerical results which qualitatively reflect many of the
observed features of the radial and spectral evolution of the turbulent
energies, the residual energy, the cross-helicity and Alfvén-ratio in
high-speed solar wind streams. These features are the following: the formation
of a characteristic "inclined eye", which evolves between the energy
spectra displayed over the frequency axis and tends to close in the radial
development of the spectra, a steepening of all spectra towards Kolmogorov-like f-5/3
spectra, the development of the normalized cross-helicity towards a constant not
much less than one and the formation of a "trough" form of the Alfvén
ratio with a z-shaped left boundary, By weighting special terms in the equations
differently, we can also cast light on the physical role of parametric
conversion model terms, wave-structure scattering model terms, nonlinear terms,
spherical expansion terms and their effects on the radial evolution of turbulent
energies in high-speed solar wind streams. |
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