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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Lugones, R., Dmitruk, P., Mininni, P.D., Wan, M., Matthaeus, W.H.
Formato: JOUR
Materias:
Magnetohydrodynamics
Magnetoplasma
Turbulence
Correlation function
Decorrelations
Magnetic field fluctuations
Magnetized plasmas
Magnetohydrodynamic turbulence
Mean magnetic field
Spatiotemporal behaviors
Time correlation functions
Temporal logic
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_1070664X_v23_n11_p_Lugones
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_1070664X_v23_n11_p_Lugones
record_format dspace
spelling todo:paper_1070664X_v23_n11_p_Lugones2023-10-03T16:02:35Z On the spatio-temporal behavior of magnetohydrodynamic turbulence in a magnetized plasma Lugones, R. Dmitruk, P. Mininni, P.D. Wan, M. Matthaeus, W.H. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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
Lugones, R.
Dmitruk, P.
Mininni, P.D.
Wan, M.
Matthaeus, W.H.
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).
format JOUR
author Lugones, R.
Dmitruk, P.
Mininni, P.D.
Wan, M.
Matthaeus, W.H.
author_facet Lugones, R.
Dmitruk, P.
Mininni, P.D.
Wan, M.
Matthaeus, W.H.
author_sort Lugones, R.
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
url http://hdl.handle.net/20.500.12110/paper_1070664X_v23_n11_p_Lugones
work_keys_str_mv AT lugonesr onthespatiotemporalbehaviorofmagnetohydrodynamicturbulenceinamagnetizedplasma
AT dmitrukp onthespatiotemporalbehaviorofmagnetohydrodynamicturbulenceinamagnetizedplasma
AT mininnipd onthespatiotemporalbehaviorofmagnetohydrodynamicturbulenceinamagnetizedplasma
AT wanm onthespatiotemporalbehaviorofmagnetohydrodynamicturbulenceinamagnetizedplasma
AT matthaeuswh onthespatiotemporalbehaviorofmagnetohydrodynamicturbulenceinamagnetizedplasma
_version_ 1782025746542231552

Ejemplares similares