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Energy cascade at the turbulent/nonturbulent interface

Y. Zhou1 and J. C. Vassilicos2,*

  • 1School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • 2Univ. Lille, CNRS, ONERA, Arts et Metiers Institute of Technology, Centrale Lille, UMR 9014-LMFL-Laboratoire de Mécanique des fluides de Lille-Kampé de Feriet, F-59000 Lille, France

  • *john-christos.vassilicos@centralelille.fr
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Phys. Rev. Fluids 5, 064604 – Published 9 June, 2020

DOI: https://doi.org/10.1103/PhysRevFluids.5.064604

Abstract

Interscale energy transfers at the vicinity of the turbulent/nonturbulent interface are from small to large scales in directions close to the interface's tangent plane where motions are predominantly stretching, but from large to small scales in the other directions where motions are predominantly compressive and significantly correlated with square angular momentum. An important role in this predominance is played by the extreme compressive motions which can be significantly more likely than extreme stretching motions even where motions are on average stretching. The most intense interscale transfer rates and dissipation occur when the interface is as far as possible from the wake centerline.

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References (9)

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Phys. Rev. Fluids 5, 064604– Published 9 June, 2020
  • Received 29 January 2020
  • Accepted 20 May 2020
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