Hall-magnetohydrodynamic turbulence with electron inertia

LUIS N. MARTIN; NAHUEL ANDRES; PABLO DMITRUK; DANIEL O. GOMEZ

Conferencia; American Geophysical Union Fall Meeting 2013; 2013

The magnetohydrodynamic (one-fluid) model is often regarded as a reasonable description of the dynamics of a plasma. One-fluidmodels are useful in the context of large scale dynamics, butwhen a more detailed description is needed (for instance, whenthe physical context favors the development of small scales) it is most appropriate to consider two-fluid models. Within the framework of two-fluid MHD for a fully ionized hydrogenplasma, we study the effect of the Hall term and electron inertiain MHD turbulence, observing whether these effects change theenergy cascade, the characteristic scales of the flow and thedynamics of global magnitudes, with particular interest in thedissipation processes.Numerical simulations of freely evolving three-dimensional reducedmagnetohydrodynamics (RHMHD) and 2.5-D Hall-MHD including electroninertia are performed for different values of the ion and electronskin depth (controlling the impact of the Hall term and the electroninertia).