The spatial development of the low-latitude boundary layer
作者： John R. Manuel , J. C. Samson
DOI: 10.1029/93JA01524
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摘要: The low-latitude boundary layer (LLBL) comprises a large fraction of the magnetospheric making it potentially important site for transport mass, momentum, and energy from magnetosheath into magnetosphere. We have used an ideal magnetohydrodynamic computer simulation with nonperiodic inflow outflow conditions to investigate processes responsible spatial development 6.4 Earth radii ( RE) long section dayside LLBL. Initializing realistic configuration, slightly modified computational efficiency, leads LLBL which broadens downstream distance thin (0.12 RE thick) laminar broad (∼0.7 turbulent one capable significant transport. Broadening occurs through action Reynolds Maxwell stresses that develop during roll-up merging vortices generated by Kelvin-Helmholtz instability in simulated indicates steep gradients at magnetopause between may further aid encouraging wave-particle diffusion transporting plasma presence flow-aligned component magnetic field, on other hand, can hinder slowing then stopping transfer their rotational kinetic deformations field.
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