European Turbulence Conference 2015

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11:15
15 mins

THE EFFECT OF LARGE-SCALE INHOMOGENEITIES ON SMALL-SCALE STRUCTURE IN A TURBULENT FLOW
Hamed Sadeghi, Philippe Lavoie, Andrew Pollard

Session: Intermittency and scaling 1
Session starts: Tuesday 25 August, 10:30
Presentation starts: 11:15
Room: Room H

Hamed Sadeghi (Mr.)
Philippe Lavoie (Prof.)
Andrew Pollard (Prof.)

Abstract:
Kolmogorov’s equation, which indicates that the mean energy is transported by both turbulent advection and molecular diffusion at any scale of flow, cannot be balanced for flows encountered in the laboratory conditions at moderate range of Reynolds numbers. The main reason for this imbalance is inhomogeneous large-scales. In this work, a new generalized form of Kolmogorov’s equation is suggested for jet flows. The validity of this equation is investigated using hot-wire data obtained across the centreline of a round turbulent jet. In addition, the external intermittency and some other basic characteristics are studied.