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Journal Articles Physical Review Fluids Year : 2022

Cascades of enstrophy and helicity in turbulence without vortex stretching

Abstract

We consider three-dimensional turbulence from which vortex stretching is removed. Using direct numerical simulations, we show that in this system a dual cascade is observed, consisting of a forward enstrophy cascade and an inverse helicity cascade. In the inverse cascade range the energy spectrum scaling is proportional to k −7/3 , with k being the wave number. In the forward cascade range the spectrum is proportional to k −3 with a logarithmic correction.
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Dates and versions

hal-03792853 , version 1 (30-09-2022)

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Tong Wu, Wouter Bos. Cascades of enstrophy and helicity in turbulence without vortex stretching. Physical Review Fluids, 2022, 7 (9), pp.094601. ⟨10.1103/PhysRevFluids.7.094601⟩. ⟨hal-03792853⟩
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