Thin shear layers in high Reynolds number turbulence - A coherent-structure model

J. C.R. Hunt, T. Ishihara, Y. Kaneda

Research output: Contribution to conferencePaper

Abstract

Direct numerical simulations of homogeneous isotropic turbulence at the Taylor microscale Reynolds number of order 103 show that the most energetic small scale motions and places with the most intense dissipation in the homogeneous isotropic turbulence are highly inhomogeneous and are located inside thin shear layers. We propose a local mechanism for how the most intense small scale and dissipative motions are produced in the vicinity of well separated thin shear layers. A model is developed based on a local rapid distortion analysis and the Townsend-Obukhov energy transfer hypothesis which is consistent with the data of the numerical simulation.

Original languageEnglish
Publication statusPublished - Jan 1 2020
Event14th European Turbulence Conference, ETC 2013 - Lyon, France
Duration: Sep 1 2013Sep 4 2013

Conference

Conference14th European Turbulence Conference, ETC 2013
CountryFrance
CityLyon
Period9/1/139/4/13

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ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Astronomy and Astrophysics
  • Atmospheric Science
  • Geophysics

Cite this

Hunt, J. C. R., Ishihara, T., & Kaneda, Y. (2020). Thin shear layers in high Reynolds number turbulence - A coherent-structure model. Paper presented at 14th European Turbulence Conference, ETC 2013, Lyon, France.