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Dissipation scaling in constant-pressure turbulent boundary layers

Jovan Nedić, Stavros Tavoularis, and Ivan Marusic
Phys. Rev. Fluids 2, 032601(R) – Published 7 March 2017

Abstract

Using results from previous direct numerical simulations and experiments in the outer region of spatially evolving turbulent boundary layers, we compute the streamwise evolution and the wall-normal variation of the dissipation parameter Cɛ, namely, the turbulent kinetic energy dissipation rate, normalized by appropriate powers of the local turbulent kinetic energy and integral length scale. For Reθ10000 (Reθ is a Reynolds number on the freestream velocity and the local momentum thickness), Cɛ is essentially constant in the streamwise direction, but varies by up to 50% in the wall-normal direction. For Reθ<10000, Cɛ is additionally found to vary in the streamwise direction and is inversely proportional to the local turbulence Reynolds number Reλ.

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  • Received 8 September 2016

DOI:https://doi.org/10.1103/PhysRevFluids.2.032601

©2017 American Physical Society

Physics Subject Headings (PhySH)

Fluid Dynamics

Authors & Affiliations

Jovan Nedić1,*, Stavros Tavoularis2, and Ivan Marusic3

  • 1Department of Mechanical Engineering, McGill University, Montreal, Québec, Canada H3A 0G4
  • 2Department of Mechanical Engineering, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
  • 3Department of Mechanical Engineering, University of Melbourne, Parkville, Victoria 3010, Australia

  • *jovan.nedic@mcgill.ca

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Vol. 2, Iss. 3 — March 2017

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