Small-scale turbulent dynamo

M. Chertkov, G. Falkovich, I. Kolokolov, M. Vergassola

Research output: Contribution to journalArticlepeer-review

89 Scopus citations


Kinematic dynamo theory is presented here for turbulent conductive fluids. We describe how inhomogeneous magnetic fluctuations are generated below the viscous scale of turbulence where the spatial smoothness of the velocity permits a systematic analysis of the Lagrangian path dynamics. We find analytically the moments and multipoint correlation functions of the magnetic field at small yet finite magnetic diffusivity. We show that the field is concentrated in long narrow strips and describe anomalous scalings and angular singularities of the multipoint correlation functions which are manifestations of the field’s intermittency. The growth rate of the magnetic field in a typical realization is found to be half the difference of two Lyapunov exponents of the same sign.

Original languageEnglish (US)
Pages (from-to)4065-4068
Number of pages4
JournalPhysical review letters
Issue number20
StatePublished - Jan 1 1999
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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