Dissipation rate of turbulent kinetic energy in stably stratified sheared flows

Sergej Zilitinkevich, Oleg Druzhinin, Andrey Glazunov, Evgeny Kadantsev, Evgeny Mortikov, Iryna Repina, Yulia Troitskaya

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Sammanfattning

Over the years, the problem of dissipation rate of turbulent kinetic energy (TKE) in stable stratification remained unclear because of the practical impossibility to directly measure the process of dissipation that takes place at the smallest scales of turbulent motion. Poor representation of dissipation causes intolerable uncertainties in turbulence-closure theory and thus in modelling stably stratified turbulent flows. We obtain a theoretical solution to this problem for the whole range of stratifications from neutral to limiting stable; and validate it via (i) direct numerical simulation (DNS) immediately detecting the dissipation rate and (ii) indirect estimates of dissipation rate retrieved via the TKE budget equation from atmospheric measurements of other components of the TKE budget. The proposed formulation of dissipation rate will be of use in any turbulence-closure models employing the TKE budget equation and in problems requiring precise knowledge of the high-frequency part of turbulence spectra in atmospheric chemistry, aerosol science, and microphysics of clouds.
Originalspråkengelska
TidskriftAtmospheric Chemistry and Physics
Volym19
Utgåva4
Sidor (från-till)2489-2496
Antal sidor8
ISSN1680-7316
DOI
StatusPublicerad - 27 feb 2019
MoE-publikationstypA1 Tidskriftsartikel-refererad

Vetenskapsgrenar

  • 114 Fysik

Citera det här

Zilitinkevich, Sergej ; Druzhinin, Oleg ; Glazunov, Andrey ; Kadantsev, Evgeny ; Mortikov, Evgeny ; Repina, Iryna ; Troitskaya, Yulia. / Dissipation rate of turbulent kinetic energy in stably stratified sheared flows. I: Atmospheric Chemistry and Physics. 2019 ; Vol. 19, Nr. 4. s. 2489-2496.
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abstract = "Over the years, the problem of dissipation rate of turbulent kinetic energy (TKE) in stable stratification remained unclear because of the practical impossibility to directly measure the process of dissipation that takes place at the smallest scales of turbulent motion. Poor representation of dissipation causes intolerable uncertainties in turbulence-closure theory and thus in modelling stably stratified turbulent flows. We obtain a theoretical solution to this problem for the whole range of stratifications from neutral to limiting stable; and validate it via (i) direct numerical simulation (DNS) immediately detecting the dissipation rate and (ii) indirect estimates of dissipation rate retrieved via the TKE budget equation from atmospheric measurements of other components of the TKE budget. The proposed formulation of dissipation rate will be of use in any turbulence-closure models employing the TKE budget equation and in problems requiring precise knowledge of the high-frequency part of turbulence spectra in atmospheric chemistry, aerosol science, and microphysics of clouds.",
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Dissipation rate of turbulent kinetic energy in stably stratified sheared flows. / Zilitinkevich, Sergej; Druzhinin, Oleg; Glazunov, Andrey; Kadantsev, Evgeny; Mortikov, Evgeny; Repina, Iryna; Troitskaya, Yulia.

I: Atmospheric Chemistry and Physics, Vol. 19, Nr. 4, 27.02.2019, s. 2489-2496.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

TY - JOUR

T1 - Dissipation rate of turbulent kinetic energy in stably stratified sheared flows

AU - Zilitinkevich, Sergej

AU - Druzhinin, Oleg

AU - Glazunov, Andrey

AU - Kadantsev, Evgeny

AU - Mortikov, Evgeny

AU - Repina, Iryna

AU - Troitskaya, Yulia

PY - 2019/2/27

Y1 - 2019/2/27

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AB - Over the years, the problem of dissipation rate of turbulent kinetic energy (TKE) in stable stratification remained unclear because of the practical impossibility to directly measure the process of dissipation that takes place at the smallest scales of turbulent motion. Poor representation of dissipation causes intolerable uncertainties in turbulence-closure theory and thus in modelling stably stratified turbulent flows. We obtain a theoretical solution to this problem for the whole range of stratifications from neutral to limiting stable; and validate it via (i) direct numerical simulation (DNS) immediately detecting the dissipation rate and (ii) indirect estimates of dissipation rate retrieved via the TKE budget equation from atmospheric measurements of other components of the TKE budget. The proposed formulation of dissipation rate will be of use in any turbulence-closure models employing the TKE budget equation and in problems requiring precise knowledge of the high-frequency part of turbulence spectra in atmospheric chemistry, aerosol science, and microphysics of clouds.

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