MHD dynamo in swirling turbulence: from deterministic to helical distributed chaos
A. Bershadskii
TL;DR
This paper demonstrates that high moments of helicity distribution can dominate magnetic field spectra in MHD dynamo turbulence, even without global helicity, using experiments, simulations, and observations.
Contribution
It introduces the concept of helical distributed chaos to explain magnetic spectra in swirling turbulence with zero global helicity.
Findings
High moments of helicity influence magnetic spectra.
Helical distributed chaos explains magnetic field behavior.
Results unify laboratory, simulation, and observational data.
Abstract
Using results of laboratory experiments, direct numerical simulations, geomagnetic and solar observations, it is shown that high moments of helicity distribution can dominate power spectra of the magnetic field generated by the magnetohydrodynamic (MHD) dynamo in swirling turbulence even for the cases with zero global helicity. The notion of helical distributed chaos has been used for this purpose.
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Taxonomy
TopicsSolar and Space Plasma Dynamics · Geomagnetism and Paleomagnetism Studies · Geophysics and Gravity Measurements