Inverse cascade of energy in helical turbulence

Franck Plunian, Andrei Teimurazov, Rodion Stepanov, Mahendra K. Verma

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Using direct numerical simulation of hydrodynamic turbulence with helicity forcing applied at all scales, a near-maximum helical turbulent state is obtained, with an inverse energy cascade at scales larger than the energy forcing scale and a forward helicity cascade at scales smaller than the energy forcing scale. In contrast to previous studies using decimated triads, our simulations contain all possible triads. By computing the shell-to-shell energy fluxes, we show that the inverse energy cascade results from weakly non-local interactions among homochiral triads. Varying the helicity injection range of scales leads to necessary conditions to obtain an inverse energy cascade.
Original languageEnglish (US)
JournalJournal of Fluid Mechanics
Volume895
DOIs
StatePublished - May 18 2020
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2022-06-14
Acknowledgements: F.P. and M.K.V. are grateful for support from IFCAM project MA/IFCAM/19/90, and CEFIPRA project 6104-1. M.K.V. and R.S. thank Grenoble Alpes University for support. Our numerical simulations have been performed on Shaheen II at the KAUST supercomputing laboratory, Saudi Arabia, under the project k1416.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Condensed Matter Physics

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