Stream dynamics between 1 AU and 2 AU - A comparison of observations and theory

Details Stream dynamics between 1 AU and 2 AU - A comparison of observations and theory Stream dynamics between 1 AU and 2 AU - A comparison of observations and theory

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.7377b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Aug. 1, 1985, p. 7377-7388. Previously announced in STAR as N85-26578

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29

Computational Fluid Dynamics, Magnetohydrodynamics, Solar Rotation, Solar Wind, Thermodynamics, Voyager Project, Counter Rotation, Entrainment, Filtration, Magnetic Fields, Mathematical Models, Pressure Gradients, Two Dimensional Models

Scientific paper

A radial alignment of three solar wind stream structures observed by IMP-7 and -8 (at 1.0 AU) and Voyager 1 and 2 (in the range 1.4 to 1.8 AU) in late 1977 is presented. It is demonstrated that several important aspects of the observed dynamical evolution can be both qualitatively and quantitatively described with a single-fluid 2-D MHD numerical model of quasi-steady corotating flow, including accurate prediction of: (1) the formation of a corotating shock pair at 1.75 AU in the case of a simple, quasi-steady stream; (2) the coalescence of the thermodynamic and magnetic structures associated with the compression regions of two neighboring, interacting, corotating streams; and (3) the dynamical destruction of a small (i.e., low velocity-amplitude, short spatial-scale) stream by its overtaking of a slower moving, high-density region associated with a preceding transient flow. The evolution of these flow systems is discussed in terms of the concepts of filtering and entrainment.

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