Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence

We show that local directional alignment of the velocity and magnetic field fluctuations occurs rapidly in magnetohydrodynamics for a variety of parameters and is seen both in direct numerical simulations and in solar wind data. The phenomenon is due to an alignment between magnetic field and gradie...

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Detalles Bibliográficos
Autores principales:	Mininni, Pablo Daniel, Dmitruk, Pablo Ariel
Publicado:	2008
Materias:	Computer simulation Kinetic energy Magnetic fields Magnetohydrodynamics Navier Stokes equations Parameter estimation Magnetohydrodynamic turbulence Navier-Stokes turbulence Turbulence
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v100_n8_p_Matthaeus http://hdl.handle.net/20.500.12110/paper_00319007_v100_n8_p_Matthaeus
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00319007_v100_n8_p_Matthaeus
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spelling	paper:paper_00319007_v100_n8_p_Matthaeus2023-06-08T14:57:47Z Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence Mininni, Pablo Daniel Dmitruk, Pablo Ariel Computer simulation Kinetic energy Magnetic fields Magnetohydrodynamics Navier Stokes equations Parameter estimation Magnetohydrodynamic turbulence Navier-Stokes turbulence Turbulence We show that local directional alignment of the velocity and magnetic field fluctuations occurs rapidly in magnetohydrodynamics for a variety of parameters and is seen both in direct numerical simulations and in solar wind data. The phenomenon is due to an alignment between magnetic field and gradients of either pressure or kinetic energy, and is similar to alignment of velocity and vorticity in Navier-Stokes turbulence. This rapid and robust relaxation process leads to a local weakening of nonlinear terms. © 2008 The American Physical Society. Fil:Mininni, P.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Dmitruk, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v100_n8_p_Matthaeus http://hdl.handle.net/20.500.12110/paper_00319007_v100_n8_p_Matthaeus
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Computer simulation Kinetic energy Magnetic fields Magnetohydrodynamics Navier Stokes equations Parameter estimation Magnetohydrodynamic turbulence Navier-Stokes turbulence Turbulence
spellingShingle	Computer simulation Kinetic energy Magnetic fields Magnetohydrodynamics Navier Stokes equations Parameter estimation Magnetohydrodynamic turbulence Navier-Stokes turbulence Turbulence Mininni, Pablo Daniel Dmitruk, Pablo Ariel Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence
topic_facet	Computer simulation Kinetic energy Magnetic fields Magnetohydrodynamics Navier Stokes equations Parameter estimation Magnetohydrodynamic turbulence Navier-Stokes turbulence Turbulence
description	We show that local directional alignment of the velocity and magnetic field fluctuations occurs rapidly in magnetohydrodynamics for a variety of parameters and is seen both in direct numerical simulations and in solar wind data. The phenomenon is due to an alignment between magnetic field and gradients of either pressure or kinetic energy, and is similar to alignment of velocity and vorticity in Navier-Stokes turbulence. This rapid and robust relaxation process leads to a local weakening of nonlinear terms. © 2008 The American Physical Society.
author	Mininni, Pablo Daniel Dmitruk, Pablo Ariel
author_facet	Mininni, Pablo Daniel Dmitruk, Pablo Ariel
author_sort	Mininni, Pablo Daniel
title	Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence
title_short	Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence
title_full	Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence
title_fullStr	Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence
title_full_unstemmed	Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence
title_sort	rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence
publishDate	2008
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v100_n8_p_Matthaeus http://hdl.handle.net/20.500.12110/paper_00319007_v100_n8_p_Matthaeus
work_keys_str_mv	AT mininnipablodaniel rapidalignmentofvelocityandmagneticfieldinmagnetohydrodynamicturbulence AT dmitrukpabloariel rapidalignmentofvelocityandmagneticfieldinmagnetohydrodynamicturbulence
_version_	1768544811293343744

Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence

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