On the dissipation rate of temperature fluctuations in stably stratified flows

Sukanta Basu; Adam W. DeMarco; Ping He

doi:10.1007/s10652-020-09761-7

On the dissipation rate of temperature fluctuations in stably stratified flows

Sukanta Basu, Adam W. DeMarco, Ping He

Atmospheric Remote Sensing

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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 language	English
Pages (from-to)	63-82
Number of pages	20
Journal	Environmental Fluid Mechanics
Volume	21
Issue number	1
DOIs	https://doi.org/10.1007/s10652-020-09761-7
Publication status	Published - 2020

Keywords

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

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Basu2021_Article_OnTheDissipationRateOfTemperatFinal published version, 5.04 MBLicence: CC BY

Cite this

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AB - 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.

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KW - Outer length scale

KW - Ozmidov scale

KW - Stable boundary layer

KW - Structure parameter

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On the dissipation rate of temperature fluctuations in stably stratified flows

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Keywords

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