Cascades in helical turbulence
Abstract
We suggest the existence of a characteristic inner scale ξ for helicity dissipation in a regime of hydrodynamic fully developed turbulence and estimate it on dimensional grounds. This scale is always larger than the Kolmogorov scale η and their ratio η/ξ vanishes in the high Reynolds number limit, so the flow will always be helicity free in the small scales. These ideas are illustrated in a shell model of turbulence.
- Publication:
-
Physical Review E
- Pub Date:
- March 2001
- DOI:
- 10.1103/PhysRevE.63.036304
- Bibcode:
- 2001PhRvE..63c6304D
- Keywords:
-
- 47.27.Jv;
- High-Reynolds-number turbulence