MHD simulations of large conducting bodies moving through a planetary magnetosphere

Statistics – Applications

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Scientific paper

The interaction between a large body with finite conductivity moving relatively to a planetary magnetic field and the magnetospheric plasma is studied by means of numerical simulations in the framework of resistive MHD. Applications discussed are spacecrafts (tethered satellites) in the Earth's ionosphere and the interaction of Jupiter with its satellite Io. The interaction excites MHD waves in which consequence an electrical current flow through the conductor is generated which extends into the surrounding plasma and propagates along the Alfvén characteristics. Thus, kinetic energy is converted into electrical energy which may be utilized for satellite projects or explain Jupiter's decametric radiation. The linear and nonlinear evolution of the plasma environment and the current system is investigated with special care taken of the principal phenomena occuring in the vicinity of the conducting body.

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