On the spatio-temporal behavior of magnetohydrodynamic turbulence in a magnetized plasma
Using direct numerical simulations of three-dimensional magnetohydrodynamic turbulence, the spatio-temporal behavior of magnetic field fluctuations is analyzed. Cases with relatively small, medium, and large values of a mean background magnetic field are considered. The (wavenumber) scale dependent...
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2016
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v23_n11_p_Lugones http://hdl.handle.net/20.500.12110/paper_1070664X_v23_n11_p_Lugones |
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paper:paper_1070664X_v23_n11_p_Lugones2023-06-08T16:04:40Z On the spatio-temporal behavior of magnetohydrodynamic turbulence in a magnetized plasma Dmitruk, Pablo Ariel Mininni, Pablo Daniel Magnetohydrodynamics Magnetoplasma Turbulence Correlation function Decorrelations Magnetic field fluctuations Magnetized plasmas Magnetohydrodynamic turbulence Mean magnetic field Spatiotemporal behaviors Time correlation functions Temporal logic Using direct numerical simulations of three-dimensional magnetohydrodynamic turbulence, the spatio-temporal behavior of magnetic field fluctuations is analyzed. Cases with relatively small, medium, and large values of a mean background magnetic field are considered. The (wavenumber) scale dependent time correlation function is directly computed for different simulations, varying the mean magnetic field value. From this correlation function, the time decorrelation is computed and compared with different theoretical times, namely, the local non-linear time, the random sweeping time, and the Alfvénic time, the latter being a wave effect. It is observed that time decorrelations are dominated by sweeping effects, and only at large values of the mean magnetic field and for wave vectors mainly aligned with this field time decorrelations are controlled by Alfvénic effects. © 2016 Author(s). 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. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v23_n11_p_Lugones http://hdl.handle.net/20.500.12110/paper_1070664X_v23_n11_p_Lugones |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Magnetohydrodynamics Magnetoplasma Turbulence Correlation function Decorrelations Magnetic field fluctuations Magnetized plasmas Magnetohydrodynamic turbulence Mean magnetic field Spatiotemporal behaviors Time correlation functions Temporal logic |
spellingShingle |
Magnetohydrodynamics Magnetoplasma Turbulence Correlation function Decorrelations Magnetic field fluctuations Magnetized plasmas Magnetohydrodynamic turbulence Mean magnetic field Spatiotemporal behaviors Time correlation functions Temporal logic Dmitruk, Pablo Ariel Mininni, Pablo Daniel On the spatio-temporal behavior of magnetohydrodynamic turbulence in a magnetized plasma |
topic_facet |
Magnetohydrodynamics Magnetoplasma Turbulence Correlation function Decorrelations Magnetic field fluctuations Magnetized plasmas Magnetohydrodynamic turbulence Mean magnetic field Spatiotemporal behaviors Time correlation functions Temporal logic |
description |
Using direct numerical simulations of three-dimensional magnetohydrodynamic turbulence, the spatio-temporal behavior of magnetic field fluctuations is analyzed. Cases with relatively small, medium, and large values of a mean background magnetic field are considered. The (wavenumber) scale dependent time correlation function is directly computed for different simulations, varying the mean magnetic field value. From this correlation function, the time decorrelation is computed and compared with different theoretical times, namely, the local non-linear time, the random sweeping time, and the Alfvénic time, the latter being a wave effect. It is observed that time decorrelations are dominated by sweeping effects, and only at large values of the mean magnetic field and for wave vectors mainly aligned with this field time decorrelations are controlled by Alfvénic effects. © 2016 Author(s). |
author |
Dmitruk, Pablo Ariel Mininni, Pablo Daniel |
author_facet |
Dmitruk, Pablo Ariel Mininni, Pablo Daniel |
author_sort |
Dmitruk, Pablo Ariel |
title |
On the spatio-temporal behavior of magnetohydrodynamic turbulence in a magnetized plasma |
title_short |
On the spatio-temporal behavior of magnetohydrodynamic turbulence in a magnetized plasma |
title_full |
On the spatio-temporal behavior of magnetohydrodynamic turbulence in a magnetized plasma |
title_fullStr |
On the spatio-temporal behavior of magnetohydrodynamic turbulence in a magnetized plasma |
title_full_unstemmed |
On the spatio-temporal behavior of magnetohydrodynamic turbulence in a magnetized plasma |
title_sort |
on the spatio-temporal behavior of magnetohydrodynamic turbulence in a magnetized plasma |
publishDate |
2016 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v23_n11_p_Lugones http://hdl.handle.net/20.500.12110/paper_1070664X_v23_n11_p_Lugones |
work_keys_str_mv |
AT dmitrukpabloariel onthespatiotemporalbehaviorofmagnetohydrodynamicturbulenceinamagnetizedplasma AT mininnipablodaniel onthespatiotemporalbehaviorofmagnetohydrodynamicturbulenceinamagnetizedplasma |
_version_ |
1768543242008133632 |