Direct simulations of helical Hall-MHD turbulence and dynamo action
Direct numerical simulations of turbulent Hall dynamos are presented. The evolution of an initially weak and small-scale magnetic field in a system maintained in a stationary turbulent regime by a stirring force at a macroscopic scale is studied to explore the conditions for exponential growth of th...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_0004637X_v619_n2I_p1019_Mininni |
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todo:paper_0004637X_v619_n2I_p1019_Mininni2023-10-03T14:01:59Z Direct simulations of helical Hall-MHD turbulence and dynamo action Mininni, P.D. Gómez, D.O. Mahajan, S.M. Accretion, accretion disks Magnetic fields MHD Stars: magnetic fields Stars: neutron Direct numerical simulations of turbulent Hall dynamos are presented. The evolution of an initially weak and small-scale magnetic field in a system maintained in a stationary turbulent regime by a stirring force at a macroscopic scale is studied to explore the conditions for exponential growth of the magnetic energy. Scaling of the dynamo efficiency with Reynolds numbers is studied, and the resulting total energy spectra are found to be compatible with a Kolmogorov-type law. A faster growth of large-scale magnetic fields is observed at intermediate intensities of the Hall effect. © 2005. The American Astronomical Society. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0004637X_v619_n2I_p1019_Mininni |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Accretion, accretion disks Magnetic fields MHD Stars: magnetic fields Stars: neutron |
| spellingShingle |
Accretion, accretion disks Magnetic fields MHD Stars: magnetic fields Stars: neutron Mininni, P.D. Gómez, D.O. Mahajan, S.M. Direct simulations of helical Hall-MHD turbulence and dynamo action |
| topic_facet |
Accretion, accretion disks Magnetic fields MHD Stars: magnetic fields Stars: neutron |
| description |
Direct numerical simulations of turbulent Hall dynamos are presented. The evolution of an initially weak and small-scale magnetic field in a system maintained in a stationary turbulent regime by a stirring force at a macroscopic scale is studied to explore the conditions for exponential growth of the magnetic energy. Scaling of the dynamo efficiency with Reynolds numbers is studied, and the resulting total energy spectra are found to be compatible with a Kolmogorov-type law. A faster growth of large-scale magnetic fields is observed at intermediate intensities of the Hall effect. © 2005. The American Astronomical Society. All rights reserved. |
| format |
JOUR |
| author |
Mininni, P.D. Gómez, D.O. Mahajan, S.M. |
| author_facet |
Mininni, P.D. Gómez, D.O. Mahajan, S.M. |
| author_sort |
Mininni, P.D. |
| title |
Direct simulations of helical Hall-MHD turbulence and dynamo action |
| title_short |
Direct simulations of helical Hall-MHD turbulence and dynamo action |
| title_full |
Direct simulations of helical Hall-MHD turbulence and dynamo action |
| title_fullStr |
Direct simulations of helical Hall-MHD turbulence and dynamo action |
| title_full_unstemmed |
Direct simulations of helical Hall-MHD turbulence and dynamo action |
| title_sort |
direct simulations of helical hall-mhd turbulence and dynamo action |
| url |
http://hdl.handle.net/20.500.12110/paper_0004637X_v619_n2I_p1019_Mininni |
| work_keys_str_mv |
AT mininnipd directsimulationsofhelicalhallmhdturbulenceanddynamoaction AT gomezdo directsimulationsofhelicalhallmhdturbulenceanddynamoaction AT mahajansm directsimulationsofhelicalhallmhdturbulenceanddynamoaction |
| _version_ |
1807324224379944960 |