Abstract:
The statistical study of magnetic reconnection events in two-dimensional turbulence has been performed by comparing numerical simulations of magnetohydrodynamics (MHD) and Hall magnetohydrodynamics (HMHD). The analysis reveals that the Hall term plays an important role in turbulence, in which magnetic islands simultaneously reconnect in a complex way. In particular, an increase of the Hall parameter, the ratio of ion skin depth to system size, broadens the distribution of reconnection rates relative to the MHD case. Moreover, in HMHD the local geometry of the reconnection region changes, manifesting bifurcated current sheets and quadrupolar magnetic field structures in analogy to laminar studies, leading locally to faster reconnection processes in this case of reconnection embedded in turbulence. This study supports the idea that the global rate of energy dissipation is controlled by the large scale turbulence, but suggests that the distribution of the reconnection rates within the turbulent system is sensitive to the microphysics at the reconnection sites. © 2012 American Institute of Physics.
Registro:
Documento: |
Artículo
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Título: | Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence |
Autor: | Donato, S.; Servidio, S.; Dmitruk, P.; Carbone, V.; Shay, M.A.; Cassak, P.A.; Matthaeus, W.H. |
Filiación: | Dipartimento di Fisica, Università della Calabria, I-87036 Cosenza, Italy Departamento de Física, Facultad de Ciencias Exactas y Naturales, CONICET, Buenos Aires, Argentina Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, United States Department of Physics, West Virginia University, Morgantown, WV 26506, United States
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Palabras clave: | Current sheets; Field structures; Hall magnetohydrodynamics; Hall parameters; Ion skin depth; Large scale turbulence; Local geometry; Magnetic island; Magnetic reconnections; Microphysics; Reconnection rate; Reconnection sites; Statistical study; System size; Turbulent systems; Two dimensional turbulence; Energy dissipation; Two dimensional; Magnetohydrodynamics |
Año: | 2012
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Volumen: | 19
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Número: | 9
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DOI: |
http://dx.doi.org/10.1063/1.4754151 |
Título revista: | Physics of Plasmas
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Título revista abreviado: | Phys. Plasmas
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ISSN: | 1070664X
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CODEN: | PHPAE
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v19_n9_p_Donato |
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Citas:
---------- APA ----------
Donato, S., Servidio, S., Dmitruk, P., Carbone, V., Shay, M.A., Cassak, P.A. & Matthaeus, W.H.
(2012)
. Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence. Physics of Plasmas, 19(9).
http://dx.doi.org/10.1063/1.4754151---------- CHICAGO ----------
Donato, S., Servidio, S., Dmitruk, P., Carbone, V., Shay, M.A., Cassak, P.A., et al.
"Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence"
. Physics of Plasmas 19, no. 9
(2012).
http://dx.doi.org/10.1063/1.4754151---------- MLA ----------
Donato, S., Servidio, S., Dmitruk, P., Carbone, V., Shay, M.A., Cassak, P.A., et al.
"Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence"
. Physics of Plasmas, vol. 19, no. 9, 2012.
http://dx.doi.org/10.1063/1.4754151---------- VANCOUVER ----------
Donato, S., Servidio, S., Dmitruk, P., Carbone, V., Shay, M.A., Cassak, P.A., et al. Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence. Phys. Plasmas. 2012;19(9).
http://dx.doi.org/10.1063/1.4754151