Laboratoire de Mécanique des Fluides et d'Acoustique - UMR 5509

LMFA - UMR 5509
Laboratoire de Mécanique des Fluides et d’Acoustique
Lyon
France


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Accueil > Équipes de Recherche > Turbulence & Instabilités > Publications T&I > Publications T&I 2018

Article dans Phys. Rev. Fluids (2018)

Cascades of energy and helicity in axisymmetric turbulence

Bo Qu, Aurore Naso, & Wouter J. T. Bos

Cascades of energy and helicity in axisymmetric turbulence

A spectral analysis of strictly axisymmetric turbulence is performed. Both freely decaying and statistically steady flows are considered. In helical flows we identify a dual cascade, where energy is transferred towards the large scales and helicity to the smallest ones. It is shown that even in the absence of net helicity, a dual cascade persists, transferring energy backward and positively and negatively polarized helicity fluctuations forward.
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