Reynolds stress scaling in the near-wall region of wall-bounded flows

ORAL

Abstract

A new scaling is derived that yields a Reynolds number independent profile for all components of the Reynolds stress in the near-wall region of wall bounded flows, including channel, pipe and boundary layer flows.  The scaling demonstrates the important role played by the wall shear stress fluctuations and how the large eddies determine the Reynolds number dependence of the near-wall turbulence behavior.

*This work was supported by ONR under Grant N00014-17-1-2309 (Program Manager Peter Chang). SP acknowledges that the pipe flow DNS results reported in this paper have been achieved using the PRACE Research Infrastructure resource MARCONI based at CINECA, Casalecchio di Reno, Italy, under project PRACE n. 2019204979. An award of computer time was provided by the Innovative and Novel Computational Impact on Theory and Experiment (INCITE) program. "This research is supported by SNL (DOE NNSA) under contract DE-NA-0003525 and used resources of the ALCF (DOE Office of Science) under contract DE-AC02-06CH11357.

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Publication: 258. Smits, A. J., Hultmark, M., Lee, M., Pirozzoli, S. and Wu, X. "Reynolds stress scaling in the near-wall region of wall-bounded flows." In press, Journal of Fluid Mechanics.

Presenters

  • Alexander J Smits

    • Princeton University

Authors

  • Alexander J Smits

    • Princeton University

  • Marcus Hultmark

    • Princeton University

  • Myoungkyu Lee

    • Sandia National Laboratories

  • Sergio Pirozzoli

    • Univ of Rome La Sapienza
    • University of Rome La Sapienza

  • Xiaohua Wu

    • Royal Military Coll