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Locality properties of the energy flux in magnetohydrodynamic turbulence
The scale locality functions, originally introduced by Kraichnan for hydrodynamic turbulence, are computed from results of direct numerical simulations of forced magnetohydrodynamic turbulence. It is found that asymptotically the dynamics is dominated by local interactions, but the locality is much...
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Published in: | Physics of fluids (1994) 2010-05, Vol.22 (5), p.051702-051702-4 |
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container_end_page | 051702-4 |
container_issue | 5 |
container_start_page | 051702 |
container_title | Physics of fluids (1994) |
container_volume | 22 |
creator | Domaradzki, J. Andrzej Teaca, Bogdan Carati, Daniele |
description | The scale locality functions, originally introduced by Kraichnan for hydrodynamic turbulence, are computed from results of direct numerical simulations of forced magnetohydrodynamic turbulence. It is found that asymptotically the dynamics is dominated by local interactions, but the locality is much weaker than in hydrodynamic turbulence, which is characterized by the scaling exponent of 4/3. Specifically, in magnetohydrodynamic turbulence, two distinct exponents are observed, 1/3 and 2/3. Despite that, direct numerical simulation results reported in this paper exhibit strong coupling between large scales from the forcing band and smallest resolved scales because the locality is too weak to achieve decoupling for the numerical resolution available. |
doi_str_mv | 10.1063/1.3431227 |
format | article |
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source | American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list); AIP Digital Archive |
subjects | Exact sciences and technology Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges Plasma turbulence Waves, oscillations, and instabilities in plasmas and intense beams |
title | Locality properties of the energy flux in magnetohydrodynamic turbulence |
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