Physics
Scientific paper
Aug 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...215..942j&link_type=abstract
Astrophysical Journal, Part 1, vol. 215, Aug. 1, 1977, p. 942-951.
Physics
137
Energy Transfer, Momentum Transfer, Solar Atmosphere, Solar Wind, Energy Dissipation, Magnetoacoustic Waves, Magnetohydrodynamic Waves, Solar Physics
Scientific paper
The fluid equations for the solar wind are presented in a form which includes the momentum and energy flux of waves in a general and consistent way. The concept of conservation of wave action is introduced and is used to derive expressions for the wave energy density as a function of heliocentric distance. The explicit form of the terms due to waves in both the momentum and energy equations are given for radially propagating acoustic, Alfven, and fast mode waves. The effect of waves as a source of momentum is explored by examining the critical points of the momentum equation for isothermal spherically symmetric flow. We find that the principal effect of waves on the solutions is to bring the critical point closer to the sun's surface and to increase the Mach number at the critical point. When a simple model of dissipation is included for acoustic waves, in some cases there are multiple critical points.
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