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The Structure of APG Turbulent Boundary Layers

  • Ayse G. GungorEmail author
  • Yvan Maciel
  • Mark P. Simens
Conference paper
Part of the ERCOFTAC Series book series (ERCO, volume 23)

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.

Keywords

Channel Flow Direct Numerical Simulation Turbulent Boundary Layer Reynolds Shear Stress Adverse Pressure Gradient 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

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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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Faculty of Aeronautics and AstronauticsIstanbul Technical UniversityIstanbulTurkey
  2. 2.Department of Mechanical EngineeringLaval UniversityQuebec CityCanada
  3. 3.School of AeronauticsUniversidad Politécnica de MadridMadridSpain

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