Numerical Modeling of the Time Evolution of Super-Small-Scale Irregularities in the Near-Earth Rarefied Plasma

Oleg V. Mingalev, Mikhail N. Melnik, Victor S. Mingalev^*

Polar Geophysical Institute, Russian Academy of Sciences, Murmansk, Russia.

DOI: 10.4236/ijg.2015.61005                

Abstract

The time evolution of the magnetic field aligned super-small-scale irregularities in the concentration of charged particles, existing in the near-Earth rarefied plasma, is studied with the help of the model simulation. A new version of the two-dimensional mathematical model, developed earlier in the Polar Geophysical Institute, is utilized to investigate the temporal history of the irregularity with circular cross section, created initially in the near-Earth plasma. The utilized model is based on a numerical solution of the Vlasov-Poisson system of equations, with the Vlasov equations describing the distribution functions of charged particles and the Poisson equation governing the self-consistent electric field. The results of simulation indicate that the mobility of the positive ions ought to influence essentially on the time evolution of the super-small-scale irregularities in the concentration of charged particles, existing in the near-Earth rarefied plasma.

Keywords

Near-Earth Plasma, Super-Small-Scale Irregularities, Numerical Simulation

Conflicts of Interest

The authors declare no conflicts of interest.

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