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Abstract: To understand the nonlinear dynamics of the Parker scenario for coronalheating, long-time high-resolution simulations of the dynamics of a coronalloop in cartesian geometry are carried out. A loop is modeled as a box extendedalong the direction of the strong magnetic field $B 0$ in which the system isembedded. At the top and bottom plates, which represent the photosphere,velocity fields mimicking photospheric motions are imposed.We show that the nonlinear dynamics is described by different regimes of MHDanisotropic turbulence, with spectra characterized by intertial range powerlaws whose indexes range from Kolmogorov-like values $\sim 5-3$ up to $\sim3$. We briefly describe the bearing for coronal heating rates.



Author: A.F. Rappazzo, M. Velli, G. Einaudi

Source: https://arxiv.org/







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