Andrés, N.; Gonzalez, C.; Martin, L.; Dmitruk, P.; Gómez, D. "Two-fluid turbulence including electron inertia" (2014) Physics of Plasmas. 21(12)
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We present a full two-fluid magnetohydrodynamic (MHD) description for a completely ionized hydrogen plasma, retaining the effects of the Hall current, electron pressure, and electron inertia. According to this description, each plasma species introduces a new spatial scale: the ion inertial length λi and the electron inertial length λe, which are not present in the traditional MHD description. In the present paper, we seek for possible changes in the energy power spectrum in fully developed turbulent regimes, using numerical simulations of the two-fluid equations in two-and-a-half dimensions. We have been able to reproduce different scaling laws in different spectral ranges, as it has been observed in the solar wind for the magnetic energy spectrum. At the smallest wavenumbers where plain MHD is valid, we obtain an inertial range following a Kolmogorov k-5/3 law. For intermediate wavenumbers such that λi -1 蠐 k 蠐 λe -1, the spectrum is modified to a k-7/3 power-law, as has also been obtained for Hall-MHD neglecting electron inertia terms. When electron inertia is retained, a new spectral region given by k > λe -1 arises. The power spectrum for magnetic energy in this region is given by a k-11/3 power law. Finally, when the terms of electron inertia are retained, we study the self-consistent electric field. Our results are discussed and compared with those obtained in the solar wind observations and previous simulations. © 2014 AIP Publishing LLC.


Documento: Artículo
Título:Two-fluid turbulence including electron inertia
Autor:Andrés, N.; Gonzalez, C.; Martin, L.; Dmitruk, P.; Gómez, D.
Filiación:Instituto de Astronomía Y Física del Espacio, CC. 67, suc. 28, Buenos Aires, 1428, Argentina
Departamento de Física, Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Buenos Aires, 1428, Argentina
Palabras clave:Electric fields; Electrons; Magnetoplasma; Power spectrum; Solar wind; Turbulent flow; Electron inertia; Electron pressures; Inertial ranges; Ion inertial length; Ionized hydrogen plasmas; Magnetic energies; Spectral region; Turbulent regime; Magnetohydrodynamics
Título revista:Physics of Plasmas
Título revista abreviado:Phys. Plasmas


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---------- APA ----------
Andrés, N., Gonzalez, C., Martin, L., Dmitruk, P. & Gómez, D. (2014) . Two-fluid turbulence including electron inertia. Physics of Plasmas, 21(12).
---------- CHICAGO ----------
Andrés, N., Gonzalez, C., Martin, L., Dmitruk, P., Gómez, D. "Two-fluid turbulence including electron inertia" . Physics of Plasmas 21, no. 12 (2014).
---------- MLA ----------
Andrés, N., Gonzalez, C., Martin, L., Dmitruk, P., Gómez, D. "Two-fluid turbulence including electron inertia" . Physics of Plasmas, vol. 21, no. 12, 2014.
---------- VANCOUVER ----------
Andrés, N., Gonzalez, C., Martin, L., Dmitruk, P., Gómez, D. Two-fluid turbulence including electron inertia. Phys. Plasmas. 2014;21(12).