Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence
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 magnet...
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2012
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v19_n9_p_Donato http://hdl.handle.net/20.500.12110/paper_1070664X_v19_n9_p_Donato |
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paper:paper_1070664X_v19_n9_p_Donato2023-06-08T16:04:38Z Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence Dmitruk, Pablo Ariel 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 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. Fil:Dmitruk, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v19_n9_p_Donato http://hdl.handle.net/20.500.12110/paper_1070664X_v19_n9_p_Donato |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Dmitruk, Pablo Ariel Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence |
| topic_facet |
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 |
| description |
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. |
| author |
Dmitruk, Pablo Ariel |
| author_facet |
Dmitruk, Pablo Ariel |
| author_sort |
Dmitruk, Pablo Ariel |
| title |
Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence |
| title_short |
Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence |
| title_full |
Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence |
| title_fullStr |
Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence |
| title_full_unstemmed |
Reconnection events in two-dimensional Hall magnetohydrodynamic turbulence |
| title_sort |
reconnection events in two-dimensional hall magnetohydrodynamic turbulence |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v19_n9_p_Donato http://hdl.handle.net/20.500.12110/paper_1070664X_v19_n9_p_Donato |
| work_keys_str_mv |
AT dmitrukpabloariel reconnectioneventsintwodimensionalhallmagnetohydrodynamicturbulence |
| _version_ |
1768542607615459328 |