Intermittency of Energy Dissipation in Alfvenic Turbulence
arXiv:1512.07355 · doi:10.1093/mnrasl/slv208
Abstract
We investigate the intermittency of energy dissipation in Alfvenic turbulence by considering the statistics of the coarse-grained energy dissipation rate, using direct measurements from numerical simulations of magnetohydrodynamic turbulence and surrogate measurements from the solar wind. We compare the results to the predictions of the log-normal and log-Poisson random cascade models. We find that, to a very good approximation, the log-normal model describes the probability density function for the energy dissipation over a broad range of scales, but does not accurately describe the scaling exponents of the moments. The log-Poisson model better describes the scaling exponents of the moments, while the comparison with the probability density function is not straightforward.
To appear in MNRAS Letters. 5 pages, 4 figures
References in corpus (9)
- Self-consistent Coronal Heating and Solar Wind Acceleration from Anisotropic Magnetohydrodynamic Turbulence
- Gamma-ray flares from the Crab Nebula
- Discovery of Powerful Gamma-Ray Flares from the Crab Nebula
- Intermittency of Solar Wind Density Fluctuations From Ion to Electron Scales
- Coexistence of Self-Organized Criticality and Intermittent Turbulence in the Solar Corona
- Energy Dissipation in Magnetohydrodynamic Turbulence: Coherent Structures or "Nanoflares"?
- Energy dynamics and current sheet structure in fluid and kinetic simulations of decaying magnetohydrodynamic turbulence
- Self-consistent Castaing distribution of solar wind turbulent fluctuations
- Dissipative Structures in Supersonic Turbulence
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