| Summary: | 碩士 === 國立中央大學 === 太空科學研究所 === 99 === The magnetohydromagnetic (MHD) plasma model ignores the ion inertial effect, so it cannot explain the meso-scale and micro-scale plasma phenomena observed in the space. At the long-wavelength limit, the ion-electron two-fluid plasma model is equivalent to the MHD plasma model, whereas the dispersion effects of the meso-scale and micro-scale plasma waves can also be included in the two-fluid plasma model if the effects of ion inertia, electron inertia, charge separation and displacement current are considered. Therefore, we can use the two-fluid model to study the cross-scale dispersion of the fast-mode, intermediated-mode, and slow-mode waves. The ion inertial effect, electron inertial effect, and the charge-separation and displacement current effect on the meso- and micro-scales wave dispersions will be examined based on four different simplified two-fluid models. The results of this thesis will provide a useful theoretical basis to assist the future studies on the multi-scale observations and the cross-scale simulations of the space plasma.
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