Multiscale Nature of the Dissipation Range in Gyrokinetic Simulations of Alfvénic Turbulence
Nonlinear energy transfer and dissipation in Alfvén wave turbulence are analyzed in the first gyrokinetic simulation spanning all scales from the tail of the MHD range to the electron gyroradius scale. For typical solar wind parameters at 1 AU, about 30% of the nonlinear energy transfer close to the...
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| Veröffentlicht in: | Physical review letters 2015-07, Vol.115 (2), p.025003-025003, Article 025003 |
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| creator | Told, D Jenko, F TenBarge, J M Howes, G G Hammett, G W |
| description | Nonlinear energy transfer and dissipation in Alfvén wave turbulence are analyzed in the first gyrokinetic simulation spanning all scales from the tail of the MHD range to the electron gyroradius scale. For typical solar wind parameters at 1 AU, about 30% of the nonlinear energy transfer close to the electron gyroradius scale is mediated by modes in the tail of the MHD cascade. Collisional dissipation occurs across the entire kinetic range k(⊥)ρ(I)≳1. Both mechanisms thus act on multiple coupled scales, which have to be retained for a comprehensive picture of the dissipation range in Alfvénic turbulence. |
| doi_str_mv | 10.1103/physrevlett.115.025003 |
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| source | American Physical Society Journals |
| subjects | Dissipation Energy transfer Fluid dynamics Fluid flow Nonlinearity Simulation Turbulence Turbulent flow |
| title | Multiscale Nature of the Dissipation Range in Gyrokinetic Simulations of Alfvénic Turbulence |
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