On the dissipation rate of temperature fluctuations in stably stratified flows

Sukanta Basu, Adam W. DeMarco, Ping He

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Abstract

In this study, we explore several integral and outer length scales of turbulence which can be formulated by using the dissipation of temperature fluctuations (χ) and other relevant variables. Our analyses directly lead to simple yet non-trivial parameterizations for both spatially-averaged χ¯ and the structure parameter of temperature (CT2). For our purposes, we make use of high-fidelity data from direct numerical simulations of stratified channel flows.

Original languageEnglish
Number of pages20
JournalEnvironmental Fluid Mechanics
DOIs
Publication statusE-pub ahead of print - 2020

Keywords

  • Integral length scale
  • Outer length scale
  • Ozmidov scale
  • Stable boundary layer
  • Structure parameter

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