Physics
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phrvl..51.1484m&link_type=abstract
Physical Review Letters (ISSN 0031-9007), vol. 51, Oct. 17, 1983, p. 1484-1487.
Physics
100
Interplanetary Medium, Magnetohydrodynamic Turbulence, Solar Wind, Computerized Simulation, Energy Spectra, Flow Velocity
Scientific paper
Additional evidence is presented for the dynamic alignment of the fluctuating plasma fluid velocity and the fluctuating magnetic field in two-dimensional MHD turbulence. The evidence is seen as indicating that the interplanetary fluctuations need not represent time-asymptotic states. Rather, it is contended that interplanetary Alfvenic fluctuations are generated in situ in the early stage of dynamic alignment. In addition to providing an explanation for inertial-range alignment of the fluctuating plasma fluid velocity and the fluctuating magnetic field in the solar wind, the model presented here accounts for the fact that the sign of this correlation (relative to the direction of the mean magnetic field) corresponds to the observed 'direction of propagation', that is, away from the sun. Evidence is found to support the contention that MHD fluctuations in the solar wind resemble turbulence arising from local stirring of the medium.
Goldstein Michel L.
Matthaeus William H.
Montgomery David C.
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