Full Program »

Experimental investigation of the near and far field structure of high Reynolds number turbulent boundary layers

PDF
0.2MB

A multiple camera, multiple resolution PIV system is used to capture a large streamwise, wall-normal field of view (2δ × 1.5δ), while simultaneously resolving the near-wall flow down to a height of y+ ≈3 at Reynolds numbers of Reτ ≈8,000to20,000. The high spatial resolution in the near-wall vicinity is used to provide a direct estimate of the wall shear stress and subsequent analysis of both the small near-wall and larger outer flow structure conditional on the local friction velocity and conversely on larger scale fluctuations. Conditional two-point correlations, and conditional mean structures will be presented.

Author(s):

Nicolas Buchmann    
Laboratory for Turbulence Research in Aerospace and Combustion, Monash University
Australia

Callum Atkinson    
Laboratory for Turbulence Research in Aerospace and Combustion, Monash University
Australia

Charitha de Silva    
Department of Mechanical Engineering, Melbourne University
Australia

Nicholas Hutchins    
Department of Mechanical Engineering, Melbourne University
Australia

Ivan Marusic    
Department of Mechanical Engineering, Melbourne University
Australia

Julio Soria    
Laboratory for Turbulence Research in Aerospace and Combustion, Monash University
Australia