Global hybrid simulations of the magnetosphere: progress report

Details Global hybrid simulations of the magnetosphere: progress report Global hybrid simulations of the magnetosphere: progress report

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm21a0531k&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SM21A-0531

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2753 Numerical Modeling, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

The ultimate understanding of the magnetosphere requires resolving important small-scale kinetic processes while accounting for the global coupling and dynamics of the magnetosphere. This implies that kinetic global simulations are bound to play a very significant role in our further understanding of the magnetospheric system and that the development of appropriate simulation models is imperative. However, due to their computationally more intensive nature kinetic simulations have been applied sparingly to global modeling efforts. In this regard, the global hybrid simulation model (fluid electrons, kinetic ions) is the next natural step beyond MHD. With more advances in computer technology, it is natural to ask to what extent global hybrid simulations are now possible. We reexamine this issue in detail. As part of this presentation, we will discuss our latest advances in code development and show examples of the application of these new codes to the global magnetospheric problem. In order to quantify the progress in kinetic simulations, we have found it useful to define the parameter "kinetic time" Tk. Tk is defined as the number of minutes that it takes a global kinetic simulation to run an equivalent of 1 minute in the real magnetospheric time. The goal is to have the kinetic time as close to unity as possible. We will quantify the utility of global kinetic simulations by discussing the values of Tk based on the existing codes, and our new codes.

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