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Evolution of Turbulent Magnetic Fields – Approach to a Steady State

Published online by Cambridge University Press:  14 August 2015

S. Nagarajan
S. Nagarajan*
Affiliation:
MATSCIENCE, Madras 20, India, and Université Libre de Bruxelles, Brussels, Belgium

Abstract

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The dynamical evolution of a weak, random, magnetic excitation in a turbulent electrically-conducting fluid is examined under varying kinematic conditions. It is found that the results of an earlier paper (Kraichnan and Nagarajan, 1967) can be reliably extended to a stage of evolution wherein the magnetic spectrum has reached local equipartition with the velocity. The transfer of the magnetic energy to smaller wavenumbers (larger scales) is considerable and significant. This result is highly pertinent to the turbulent dynamo question, which has been variously investigated recently. The relevance of the coupling of the rms magnetic field to the magnetic modes of all scales in deciding the efficiency of this transfer is discussed.

Type
Part V: Theories of Small Scale Magnetic Fields
Information
Symposium - International Astronomical Union , Volume 43: Solar Magnetic Fields , 1971 , pp. 487 - 504
Copyright
Copyright © Reidel 1971 

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