Scale interactions in magnetohydrodynamic turbulence
This article reviews recent studies of scale interactions in magnetohydrodynamic turbulence. The present-day increase of computing power, which allows for the exploration of different configurations of turbulence in conducting flows, and the development of shell-to-shell transfer functions, has led...
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2011
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00664189_v43_n_p377_Mininni http://hdl.handle.net/20.500.12110/paper_00664189_v43_n_p377_Mininni |
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paper:paper_00664189_v43_n_p377_Mininni2023-06-08T15:06:08Z Scale interactions in magnetohydrodynamic turbulence Mininni, Pablo Daniel isotropy magnetohydrodynamics modeling simulation universality Astrophysical applications Computing power Decaying turbulence Different scale Dynamo action Hydrodynamic turbulence isotropy Magnetic energies Magnetic helicity Magnetohydrodynamic turbulence modeling Nonlocal Scale interactions Shell-to-shell transfers simulation Small scale universality Velocity fluctuations Electric generators Lorentz force Magnetic fields Magnetohydrodynamics Turbulence anisotropic medium damping geodynamo isotropy kinetic energy literature review magnetic field magnetohydrodynamics turbulence This article reviews recent studies of scale interactions in magnetohydrodynamic turbulence. The present-day increase of computing power, which allows for the exploration of different configurations of turbulence in conducting flows, and the development of shell-to-shell transfer functions, has led to detailed studies of interactions between the velocity and the magnetic field and between scales. In particular, processes such as induction and dynamo action, the damping of velocity fluctuations by the Lorentz force, and the development of anisotropies can be characterized at different scales. In this context we consider three different configurations often studied in the literature: mechanically forced turbulence, freely decaying turbulence, and turbulence in the presence of a uniform magnetic field. Each configuration is of interest for different geophysical and astrophysical applications. Local and nonlocal transfers are discussed for each case. Whereas the transfer between scales of solely kinetic or solely magnetic energy is local, transfers between kinetic and magnetic fields are observed to be local or nonlocal depending on the configuration. Scale interactions in the cascade of magnetic helicity are also reviewed. Based on the results, the validity of several usual assumptions in hydrodynamic turbulence, such as isotropy of the small scales or universality, is discussed. © 2011 by Annual Reviews. All rights reserved. Fil:Mininni, P.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00664189_v43_n_p377_Mininni http://hdl.handle.net/20.500.12110/paper_00664189_v43_n_p377_Mininni |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
isotropy magnetohydrodynamics modeling simulation universality Astrophysical applications Computing power Decaying turbulence Different scale Dynamo action Hydrodynamic turbulence isotropy Magnetic energies Magnetic helicity Magnetohydrodynamic turbulence modeling Nonlocal Scale interactions Shell-to-shell transfers simulation Small scale universality Velocity fluctuations Electric generators Lorentz force Magnetic fields Magnetohydrodynamics Turbulence anisotropic medium damping geodynamo isotropy kinetic energy literature review magnetic field magnetohydrodynamics turbulence |
| spellingShingle |
isotropy magnetohydrodynamics modeling simulation universality Astrophysical applications Computing power Decaying turbulence Different scale Dynamo action Hydrodynamic turbulence isotropy Magnetic energies Magnetic helicity Magnetohydrodynamic turbulence modeling Nonlocal Scale interactions Shell-to-shell transfers simulation Small scale universality Velocity fluctuations Electric generators Lorentz force Magnetic fields Magnetohydrodynamics Turbulence anisotropic medium damping geodynamo isotropy kinetic energy literature review magnetic field magnetohydrodynamics turbulence Mininni, Pablo Daniel Scale interactions in magnetohydrodynamic turbulence |
| topic_facet |
isotropy magnetohydrodynamics modeling simulation universality Astrophysical applications Computing power Decaying turbulence Different scale Dynamo action Hydrodynamic turbulence isotropy Magnetic energies Magnetic helicity Magnetohydrodynamic turbulence modeling Nonlocal Scale interactions Shell-to-shell transfers simulation Small scale universality Velocity fluctuations Electric generators Lorentz force Magnetic fields Magnetohydrodynamics Turbulence anisotropic medium damping geodynamo isotropy kinetic energy literature review magnetic field magnetohydrodynamics turbulence |
| description |
This article reviews recent studies of scale interactions in magnetohydrodynamic turbulence. The present-day increase of computing power, which allows for the exploration of different configurations of turbulence in conducting flows, and the development of shell-to-shell transfer functions, has led to detailed studies of interactions between the velocity and the magnetic field and between scales. In particular, processes such as induction and dynamo action, the damping of velocity fluctuations by the Lorentz force, and the development of anisotropies can be characterized at different scales. In this context we consider three different configurations often studied in the literature: mechanically forced turbulence, freely decaying turbulence, and turbulence in the presence of a uniform magnetic field. Each configuration is of interest for different geophysical and astrophysical applications. Local and nonlocal transfers are discussed for each case. Whereas the transfer between scales of solely kinetic or solely magnetic energy is local, transfers between kinetic and magnetic fields are observed to be local or nonlocal depending on the configuration. Scale interactions in the cascade of magnetic helicity are also reviewed. Based on the results, the validity of several usual assumptions in hydrodynamic turbulence, such as isotropy of the small scales or universality, is discussed. © 2011 by Annual Reviews. All rights reserved. |
| author |
Mininni, Pablo Daniel |
| author_facet |
Mininni, Pablo Daniel |
| author_sort |
Mininni, Pablo Daniel |
| title |
Scale interactions in magnetohydrodynamic turbulence |
| title_short |
Scale interactions in magnetohydrodynamic turbulence |
| title_full |
Scale interactions in magnetohydrodynamic turbulence |
| title_fullStr |
Scale interactions in magnetohydrodynamic turbulence |
| title_full_unstemmed |
Scale interactions in magnetohydrodynamic turbulence |
| title_sort |
scale interactions in magnetohydrodynamic turbulence |
| publishDate |
2011 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00664189_v43_n_p377_Mininni http://hdl.handle.net/20.500.12110/paper_00664189_v43_n_p377_Mininni |
| work_keys_str_mv |
AT mininnipablodaniel scaleinteractionsinmagnetohydrodynamicturbulence |
| _version_ |
1768544723120685056 |