Chaotic/turbulent cross-helical MHD dynamo
A. Bershadskii
Published: 2025/7/23
Abstract
Using results of laboratory experiments and direct numerical simulations, it is shown that cross-helicity can dominate power spectra of the magnetic field generated by magnetohydrodynamic (MHD) dynamo in a chaotic/turbulent von K\'{a}rm\'{a}n flow and its numerical analogue (simulation). The theoretical consideration is based on a Kolmogorov-like phenomenology within the framework of the distributed chaos concept. The observations of the dynamics of the solar magnetic field (solar activity) have been briefly discussed in this context.