Evolution of Turbulent Magnetic Fluctuation Power with Heliospheric Distance

G. P. Zank, W. H. Matthaeus and C. W. Smith

Proceedings of Solar Wind 8, in press (1996)


On the basis of transport theories appropriate to a radially expanding solar wind, new results for the radial evolution of the energy density in solar wind fluctuations at MHD scales are derived. The models, which represent a departure from the well-known WKB description, include the effects of ``mixing'', driving the stream-stream interactions and interstellar pick-up ion generated waves as well as non-isotropic MHD turbulence.

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