Abstract
The mathematical basis for approximating the solar wind expansion as nearly radial is examined and defined, removing earlier restrictions thought to occur in the presence of a magnetic field and large variations in latitude. The equations and side conditions governing quasi-radial flow are derived and solved for a simple example to illustrate how this technique can be used for global models of the solar wind.
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Presently at the High Altitude Observatory of the National Center for Atmospheric Research (sponsored by the National Science Foundation).
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Suess, S.T., Nerney, S.F. Solar wind: The quasi-radial approximation and its limitations. Sol Phys 40, 487–499 (1975). https://doi.org/10.1007/BF00162393
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DOI: https://doi.org/10.1007/BF00162393