Turbulent field helicity fluctuations and mean helicity appearance

O. G. Chkhetiani, E. Golbraikh

Research output: Contribution to journalReview articlepeer-review

4 Scopus citations

Abstract

There are many experiments where nonzero mean turbulent helicity is measured either directly or indirectly. Despite the study of mechanisms of its occurrence, the question of mean helicity generation remains open. In our paper, we explore the emergence of the mean helicity in the turbulent field created by an external random force with zero helicity under a simultaneous external large-scale impact (rotation or homogeneous magnetic field). It is shown that anisotropy (even weak one) results in the appearance of mean helicity and in the emergence of an analog of the diamagnetic effect in the vortex field.

Original languageEnglish
Pages (from-to)113-117
Number of pages5
JournalInternational Journal of Non-Linear Mechanics
Volume47
Issue number3
DOIs
StatePublished - 1 Apr 2012

Keywords

  • Helicity
  • Helicity generation
  • Turbulence

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