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Experimental measurement of large-scale three-dimensional structures in a turbulent boundary layer. II: Long structures. (English) Zbl 1225.76034

Summary: Three-dimensional (3D) measurements of a turbulent boundary layer have been made using high-speed particle image velocimetry (PIV) coupled with Taylor’s hypothesis, with the objective of characterising the very long streamwise structures that have been observed previously. The measurements show the 3D character of both low- and high-speed structures over very long volumes. The statistics of these structures are considered, as is their relationship to the important turbulence quantities. In particular, the length of the structures and their wall-normal extent have been considered and their relationship to the other components of the velocity fluctuations and the instantaneous stress.
For part I, cf. [J. Fluid Mech. 673, 180–217 (2011; Zbl 1225.76009)].

MSC:

76-06 Proceedings, conferences, collections, etc. pertaining to fluid mechanics
76F40 Turbulent boundary layers

Citations:

Zbl 1225.76009
Full Text: DOI

References:

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