European Turbulence Conference 2015

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15:00
15 mins

EXPERIMENTAL CHARACTERISATION OF LARGE SCALE STRUCTURES IN A HIGH REYNOLDS NUMBER TURBULENT BOUNDARY LAYER
Sricharan Srinath, Christophe Cuvier, Jean-Marc Foucaut, Jean-Philippe Laval

Session: Wall-bounded flows 2
Session starts: Tuesday 25 August, 15:00
Presentation starts: 15:00
Room: Room I

Sricharan Srinath (ECLille, LML, F-59650 Villeneuve d’Ascq, France)
Christophe Cuvier (USTL, LML, F-59650 Villeneuve d’Ascq, France)
Jean-Marc Foucaut (ECLille, LML, F-59650 Villeneuve d’Ascq, France)
Jean-Philippe Laval (CNRS, UMR 8107, F-59650 Villeneuve d’Ascq, France)

Abstract:
A very large field of view (4δ x 1δ) with a good spatial resolution owing to the use of four 2k x 2k pixel cameras was conducted in a flat plate boundary layer at two Reynolds numbers (Reθ ≈7,500 and 20,000). Comparing the flow statistics with previously obtained hot-wire data under similar flow conditions show good agreement. The goal of this experiment is to detect and characterise the large scale motions which develop in the log region of a high Reynolds number turbulent boundary layer.