Other
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm51d..07o&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SM51D-07
Other
2724 Magnetopause, Cusp, And Boundary Layers, 2753 Numerical Modeling, 2784 Solar Wind/Magnetosphere Interactions, 7835 Magnetic Reconnection, 7843 Numerical Simulation Studies
Scientific paper
The magnetospheric cusps are an important structural element of the Earth's magnetosphere. Magnetic flux from the magnetospheric boundaries converges into the cusps and the magnetic field in the vicinity of the cusps rotates by 360 degrees. The magnetic field and plasma flow configuration allows for magnetic reconnection and Kelvin Helmholtz instabilities in the vicinity of the cusps. In addition plasma flow can become turbulent due to boundary layer separation as a result of the plasma flow over the cusp indentation. However, there are very few models based on first principles and with good numerical resolution which address the cusp physics. Here we will present first results based on MHD simulations with an initial condition which includes a cusp-like magnetic field indentation. The initial conditions particularly address cases with a magnetic field and plasma flow aligned and perpendicular to each other. The results consider a variation of the velocity on the magnetosheath side as well as the influence of viscosity on the the flow structure in and adjacent to the cusp.
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