Inverse cascade of energy in helical turbulence
arXiv:2005.04701 · doi:10.1017/jfm.2020.307
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.
arXiv comment13 pages, 10 figures
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Cited by in corpus (6)
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- Inverse cascade of energy in helical turbulence
- Inverse cascades of kinetic energy and thermal variance in three-dimensional horizontally extended turbulent convection
- Odd viscosity suppresses intermittency in direct turbulent cascades
- Dynamic Phase Alignment in Navier-Stokes Turbulence
- A self-induced mechanism of large-scale helical structures in compressible turbulent flows