Inverse cascade of energy in helical turbulence

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...

Full description

Saved in:
Bibliographic Details
Published in:Journal of fluid mechanics 2020-07, Vol.895, Article A13
Main Authors: Plunian, Franck, Teimurazov, Andrei, Stepanov, Rodion, Verma, Mahendra Kumar
Format: Article
Language:English
Subjects:
Computer simulation
Direct numerical simulation
Energy
Fluxes
Friction
Helicity
Hydrodynamics
Mathematical models
Reynolds number
Simulation
Turbulence
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0022-1120
1469-7645
DOI:10.1017/jfm.2020.307