Inverse cascade of energy in helical turbulence
| Autor: | Andrei Teimurazov, Rodion Stepanov, Franck Plunian, Mahendra K. Verma |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Range (particle radiation) Forcing (recursion theory) Turbulence Mechanical Engineering Direct numerical simulation Fluid Dynamics (physics.flu-dyn) Inverse FOS: Physical sciences Mechanics Physics - Fluid Dynamics Condensed Matter Physics 01 natural sciences Helicity 010305 fluids & plasmas Mechanics of Materials Cascade Energy cascade 0103 physical sciences 010306 general physics |
| Popis: | 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. 13 pages, 10 figures |
| Databáze: | OpenAIRE |
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