2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/80518Cross 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 $Re_λ\approx 100$.4 pages, 2 figures, Will be published as part of IUTAM meeting 2002Chaotic Dynamicstext