IFIBA   22255
INSTITUTO DE FISICA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Intermittency in Hall-magnetohydrodynamics with a strong guide field
Autor/es:
P. RODRIGUEZ IMAZIO; L.N. MARTIN; P. DMITRUK; P. D. MININNI
Revista:
PHYSICS OF PLASMAS
Editorial:
AMER INST PHYSICS
Referencias:
Lugar: New York; Año: 2013 vol. 20 p. 525061 - 525069
ISSN:
1070-664X
Resumen:
We present a detailed study of intermittency in the velocity and magnetic field fluctuations of compressible Hall-magnetohydrodynamic turbulence with an external guide field. To solve the equations numerically, a reduced model valid when a strong guide field is present is used. Different values for the ion skin depth are considered in the simulations. The resulting data are analyzed computing field increments in several directions perpendicular to the guide field, and building structure functions and probability density functions. In the magnetohydrodynamic limit, we recover the usual results with the magnetic field being more intermittent than the velocity field. In the presence of the Hall effect, field fluctuations at scales smaller than the ion skin depth show a substantial decrease in the level of intermittency, with close to monofractal scaling.