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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Guardado en:
Detalles Bibliográficos
Publicado: 2005
Materias:
Accretion, accretion disks
Magnetic fields
MHD
Stars: magnetic fields
Stars: neutron
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v619_n2I_p1019_Mininni
http://hdl.handle.net/20.500.12110/paper_0004637X_v619_n2I_p1019_Mininni
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0004637X_v619_n2I_p1019_Mininni
record_format dspace
spelling paper:paper_0004637X_v619_n2I_p1019_Mininni2023-06-08T14:28:50Z Direct simulations of helical Hall-MHD turbulence and dynamo action 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. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v619_n2I_p1019_Mininni 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
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.
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
publishDate 2005
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v619_n2I_p1019_Mininni
http://hdl.handle.net/20.500.12110/paper_0004637X_v619_n2I_p1019_Mininni
_version_ 1768546566020268032

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