Nanoflares and MHD turbulence in coronal loops: a hybrid shell model.
A model to describe injection, due to footpoint motions, storage, and dissipation of MHD turbulence in coronal loops, is presented. The model is based on the use of the shell technique in the wave vector space applied to the set of reduced MHD equations. Numerical simulation showed that the energy injected is efficiently stored in the loop where a significant level of magnetic and velocity fluctuations is obtained. Nonlinear interactions among these fluctuations give rise to an energy cascade towards smaller scales where energy is dissipated in an intermittent fashion. The statistical analysis performed on the intermittent dissipative events compares well with all observed properties of nanoflare emission statistics.
Nigro
Giuseppina
G
Dipartimento di Fisica, Università della Calabria, and Istituto Nazionale di Fisica della Materia, Unità di Cosenza, I-87030 Arcavacata di Rende, Italy.
Malara
Francesco
F
Carbone
Vincenzo
V
Veltri
Pierluigi
P