A one-dimensional multispecies magnetohydrodynamic model of the dayside ionosphere of Mars

摘要: The behavior of the plasma and magnetic field in dayside ionosphere Venus was studied for both time-dependent steady state conditions, using a one-dimensional multispecies MHD model. coupled continuity, momentum, Maxwell's equations were solved simultaneously several ion species. model includes momentum coupling terms all ion-ion ion-neutral interactions. present is more complete than “one-major-ion” Shinagawa et al. (1987). results are compared; they indicate that one-major-ion treatment fairly good approximation. lower maintained by flux transported downward from barrier region motion, typical time scale decay about hours. Two new cases presented: (1) conditions magnetized ionosphere, (2) inclusion loss due to horizontal transport region. For electric should be independent altitude Above 160 km, convective motion contributes field, while below km ohmic resistivity term makes main contribution field. effects divergence velocity approximately included solving simplified equation. resulting calculated profiles electron density agree much better with observations at high altitudes those without terms. These importance processes altitudes.