Bibcode
Rappazzo, A. F.; Velli, M.
Bibliographical reference
Physical Review E, vol. 83, Issue 6, id. 065401
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6
2011
Journal
Citations
23
Refereed citations
23
Description
The Parker model for coronal heating is investigated through a high
resolution simulation. An inertial range is resolved where fluctuating
magnetic energy
EM(k⊥)∝k⊥-2.7
exceeds kinetic energy
EK(k⊥)∝k⊥-0.6.
Increments scale as
δbℓ≃ℓ-0.85andδuℓ≃ℓ+0.2
with velocity increasing at small scales, indicating that magnetic
reconnection plays a prime role in this turbulent system. We show that
spectral energy transport is akin to standard magnetohydrodynamic (MHD)
turbulence even for a system of reconnecting current sheets sustained by
the boundary. In this new MHD turbulent cascade, kinetic energy flows
are negligible while cross-field flows are enhanced, and through a
series of “reflections” between the two fields, cascade more
than half of the total spectral energy flow.