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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Autores principales: Matthaeus, W.H., Pouquet, A., Mininni, P.D., Dmitruk, P., Breech, B.
Formato: JOUR
Materias:
Computer simulation
Kinetic energy
Magnetic fields
Magnetohydrodynamics
Navier Stokes equations
Parameter estimation
Magnetohydrodynamic turbulence
Navier-Stokes turbulence
Turbulence
Acceso en línea: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 todo:paper_00319007_v100_n8_p_Matthaeus
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spelling todo:paper_00319007_v100_n8_p_Matthaeus2023-10-03T14:42:00Z Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence Matthaeus, W.H. Pouquet, A. Mininni, P.D. Dmitruk, P. Breech, B. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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
Matthaeus, W.H.
Pouquet, A.
Mininni, P.D.
Dmitruk, P.
Breech, B.
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.
format JOUR
author Matthaeus, W.H.
Pouquet, A.
Mininni, P.D.
Dmitruk, P.
Breech, B.
author_facet Matthaeus, W.H.
Pouquet, A.
Mininni, P.D.
Dmitruk, P.
Breech, B.
author_sort Matthaeus, W.H.
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
url http://hdl.handle.net/20.500.12110/paper_00319007_v100_n8_p_Matthaeus
work_keys_str_mv AT matthaeuswh rapidalignmentofvelocityandmagneticfieldinmagnetohydrodynamicturbulence
AT pouqueta rapidalignmentofvelocityandmagneticfieldinmagnetohydrodynamicturbulence
AT mininnipd rapidalignmentofvelocityandmagneticfieldinmagnetohydrodynamicturbulence
AT dmitrukp rapidalignmentofvelocityandmagneticfieldinmagnetohydrodynamicturbulence
AT breechb rapidalignmentofvelocityandmagneticfieldinmagnetohydrodynamicturbulence
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