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Article Dans Une Revue Physics of Fluids Année : 2017

Split energy cascade in turbulent thin fluid layers

Résumé

We discuss the phenomenology of the split energy cascade in a three-dimensional thin fluid layer by mean of high resolution numerical simulations of the Navier-Stokes equations. We observe the presence of both an inverse energy cascade at large scales, as predicted for two-dimensional turbulence , and of a direct energy cascade at small scales, as in three-dimensional turbulence. The inverse energy cascade is associated with a direct cascade of enstrophy in the intermediate range of scales. Notably, we find that the inverse cascade of energy in this system is not a pure 2D phenomenon, as the coupling with the 3D velocity field is necessary to guarantee the constancy of fluxes.
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Dates et versions

hal-01636028 , version 1 (16-11-2017)

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  • HAL Id : hal-01636028 , version 1

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Stefano Musacchio, Guido Boffetta. Split energy cascade in turbulent thin fluid layers. Physics of Fluids, 2017. ⟨hal-01636028⟩
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