Abstract:
It is well known that the magnetic helicity is not a single invariant in ideal magnetohydrodynamics. We study the problem of whether the exponent −1.7 of the slope of the turbulent spectrum of magnetic energy can be explained. An affirmative answer is obtained under the assumption that the quasiperiodic magnetic field is freely distributed over the scale. The answer is based on the use of the asymptotic Hopf invariant and the M-invariant (numerical measure of knottedness of magnetic lines).
Keywords:
magnetic helicity, magnetic energy, M-invariant.
Citation:
P. M. Akhmet'ev, “Topological meaning of the slope of the Kolmogorov spectrum of magnetic turbulence”, TMF, 209:2 (2021), 351–366; Theoret. and Math. Phys., 209:2 (2021), 1620–1632
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\by P.~M.~Akhmet'ev
\paper Topological meaning of the~slope of the~Kolmogorov spectrum of magnetic turbulence
\jour TMF
\yr 2021
\vol 209
\issue 2
\pages 351--366
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\jour Theoret. and Math. Phys.
\yr 2021
\vol 209
\issue 2
\pages 1620--1632
\crossref{https://doi.org/10.1134/S0040577921110088}
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Linking options:
https://www.mathnet.ru/eng/tmf10130
https://doi.org/10.4213/tmf10130
https://www.mathnet.ru/eng/tmf/v209/i2/p351
This publication is cited in the following 1 articles:
P. M. Akhmet'ev, “Topological meaning of the slope of the Kolmogorov spectrum of magnetic turbulence: M5-invariant of magnetic lines and its combinatorial formula”, Journal of Geometry and Physics, 178 (2022), 104583