Statistics – Computation
Scientific paper
Jan 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000stin...0021484o&link_type=abstract
Technical Report, Raytheon STX Corp. Lanham, MD United States
Statistics
Computation
Solar Wind, Nonlinearity, Time Dependence, Magnetohydrodynamics, Simulation, Magnetohydrodynamic Waves, Wave-Particle Interactions, Two Fluid Models, Magnetohydrodynamic Flow, Two Dimensional Models, Three Dimensional Models, Coronal Holes, Solar Activity, Solitary Waves, Soho Mission, Conductive Heat Transfer, Random Processes, Plumes, Spatial Dependencies, Magnetic Field Configurations
Scientific paper
The purpose of this investigation is to develop a new model for the acceleration of the fast solar wind by nonlinear, time-dependent multidimensional MHD simulations of waves in solar coronal holes. Preliminary computational studies indicate that solitary-like waves are generated in coronal holes nonlinearly by torsional Alfven waves. These waves in addition to thermal conduction may contribute considerably to the accelerate the solar wind. Specific goals of this proposal are to investigate the generation of nonlinear solitary-like waves and their effect on solar wind acceleration by numerical 2.5D MHD simulation of coronal holes with a broad range of plasma and wave parameters; to study the effect of random disturbances at the base of a solar coronal hole on the fast solar wind acceleration with a more advanced 2.5D MHD model and to compare the results with the available observations; to extend the study to a full 3D MHD simulation of fast solar wind acceleration with a more realistic model of a coronal hole and solar boundary conditions. The ultimate goal of the three year study is to model the fast solar wind in a coronal hole, based on realistic boundary conditions in a coronal hole near the Sun, and the coronal hole structure (i.e., density, temperature, and magnetic field geometry) that will become available from the recently launched SOHO spacecraft.
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