Derivative moments in turbulent shear flows
arXiv:nlin/0210010 · doi:10.1063/1.1524627
Abstract
We propose a generalized perspective on the behavior of high-order derivative moments in turbulent shear flows by taking account of the roles of small-scale intermittency and mean shear, in addition to the Reynolds number. Two asymptotic regimes are discussed with respect to shear effects. By these means, some existing disagreements on the Reynolds number dependence of derivative moments can be explained. That odd-order moments of transverse velocity derivatives tend not vanish as expected from elementary scaling considerations does not necessarily imply that small-scale anisotropy persists at all Reynolds numbers.
11 pages, 7 Postscript figures
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- Small scale structure of homogeneous turbulent shear flow
- Two-way coupling of FENE dumbbells with a turbulent shear flow
- Statistical analysis of the velocity and scalar fields in reacting turbulent wall-jets
- Decaying turbulence: what happens when the correlation length varies spatially in two adjacent zones
- Statistics of velocity gradients in wall-bounded shear flow turbulence
- Transverse velocities, intermittency and asymmetry in fully developed turbulence