Magnetic field reversals and long-time memory in conducting flows

Employing a simple ideal magnetohydrodynamic model in spherical geometry, we show that the presence of either rotation or finite magnetic helicity is sufficient to induce dynamical reversals of the magnetic dipole moment. The statistical character of the model is similar to that of terrestrial magne...

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Detalles Bibliográficos
Autores principales: Dmitruk, Pablo Ariel, Mininni, Pablo Daniel
Publicado: 2014
Materias:
Magnetic field reversal
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15393755_v90_n4_p_Dmitruk
http://hdl.handle.net/20.500.12110/paper_15393755_v90_n4_p_Dmitruk
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_15393755_v90_n4_p_Dmitruk
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spelling paper:paper_15393755_v90_n4_p_Dmitruk2023-06-08T16:21:01Z Magnetic field reversals and long-time memory in conducting flows Dmitruk, Pablo Ariel Mininni, Pablo Daniel Magnetic field reversal Employing a simple ideal magnetohydrodynamic model in spherical geometry, we show that the presence of either rotation or finite magnetic helicity is sufficient to induce dynamical reversals of the magnetic dipole moment. The statistical character of the model is similar to that of terrestrial magnetic field reversals, with the similarity being stronger when rotation is present. The connection between long-time correlations, 1/f noise, and statistics of reversals is supported, consistent with earlier suggestions. © 2014 American Physical Society. Fil:Dmitruk, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mininni, P.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15393755_v90_n4_p_Dmitruk http://hdl.handle.net/20.500.12110/paper_15393755_v90_n4_p_Dmitruk
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Magnetic field reversal
spellingShingle Magnetic field reversal
Dmitruk, Pablo Ariel
Mininni, Pablo Daniel
Magnetic field reversals and long-time memory in conducting flows
topic_facet Magnetic field reversal
description Employing a simple ideal magnetohydrodynamic model in spherical geometry, we show that the presence of either rotation or finite magnetic helicity is sufficient to induce dynamical reversals of the magnetic dipole moment. The statistical character of the model is similar to that of terrestrial magnetic field reversals, with the similarity being stronger when rotation is present. The connection between long-time correlations, 1/f noise, and statistics of reversals is supported, consistent with earlier suggestions. © 2014 American Physical Society.
author Dmitruk, Pablo Ariel
Mininni, Pablo Daniel
author_facet Dmitruk, Pablo Ariel
Mininni, Pablo Daniel
author_sort Dmitruk, Pablo Ariel
title Magnetic field reversals and long-time memory in conducting flows
title_short Magnetic field reversals and long-time memory in conducting flows
title_full Magnetic field reversals and long-time memory in conducting flows
title_fullStr Magnetic field reversals and long-time memory in conducting flows
title_full_unstemmed Magnetic field reversals and long-time memory in conducting flows
title_sort magnetic field reversals and long-time memory in conducting flows
publishDate 2014
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15393755_v90_n4_p_Dmitruk
http://hdl.handle.net/20.500.12110/paper_15393755_v90_n4_p_Dmitruk
work_keys_str_mv AT dmitrukpabloariel magneticfieldreversalsandlongtimememoryinconductingflows
AT mininnipablodaniel magneticfieldreversalsandlongtimememoryinconductingflows
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