Abstract
The characteristics of three-dimensional intense uv-structures (Qs) in a strongly decelerated large-velocity-defect boundary layer are analyzed. The Q2 and Q4 structures are found to be different from those of turbulent channel flows studied by Lozano-Durán et al. (J Fluid Mech 694:100–130, 2012). They are less streamwise elongated, less present near the wall and wall-detached structures are more numerous. Moreover, contrary to channel flows, wall-detached Q2, and Q4 structures contribute significantly to the Reynolds shear stress.
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Acknowledgments
Funded in part by the Multiflow program of the European Research Council. YM was supported in part by NSERC of Canada. We are grateful to A. Lozano-Durán for providing the data processing programs for the analysis of the Q structures.
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Gungor, A.G., Maciel, Y., Simens, M.P. (2016). The Structure of APG Turbulent Boundary Layers. In: Stanislas, M., Jimenez, J., Marusic, I. (eds) Progress in Wall Turbulence 2. ERCOFTAC Series, vol 23. Springer, Cham. https://doi.org/10.1007/978-3-319-20388-1_25
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DOI: https://doi.org/10.1007/978-3-319-20388-1_25
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