Asymmetric time correlations in turbulent shear flows

Details Asymmetric time correlations in turbulent shear flows Asymmetric time correlations in turbulent shear flows

2003-06-25

arxiv.org/abs/nlin/0306054v1

Nonlinear Sciences

Chaotic Dynamics

4 pages, 2 figures, Will be published as part of IUTAM meeting 2002

Scientific paper

Cross correlations between normal and downstream velocity fluctuations in a
turbulent shear flow are shown to carry information about the non-normal
amplification process. The creation of spanwise modulated streaks by downstream
vortices implies an asymmetry in temporal correlation functions. We verify this
in numerical simulations in shear flows with $Re_\lambda\approx 100$.

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