An explicit WET-type model for the turbulent scalar fluxes

Masoud Rokni; Bengt Sundén

doi:10.2495/AFM020061

An explicit WET-type model for the turbulent scalar fluxes

Masoud Rokni, Bengt Sundén

Heat Transfer

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

Abstract

A new explicit WET model for the turbulent heat fluxes is derived and developed from the transport equation of the scalar passive flux. In order to study the performance of the model itself, all other turbulent quantities are taken from a DNS channel flow data-base and thus the error source has been minimized. This anisotropic eddy diffusivity model can be solved with a two-equation model for the temperature field based on the temperature variance and its dissipation rate. The model can theoretically be used for a range of Prandtl numbers or a range of different fluids. The results are compared with the DNS channel flow and fairly good agreement is achieved

Original language	English
Title of host publication	Advances in Fluid Mechanics. AFM 2002. Fourth International Conference
Editors	M. Rahman, R. Verhoeven, C.A. Brebbia
Publisher	WIT Press
Pages	55-64
ISBN (Print)	1-85312-910-0
DOIs	https://doi.org/10.2495/AFM020061
Publication status	Published - 2002
Event	4th International Conference on Advances in Fluid Mechanics - Ghent, Belgium Duration: 2002 May 15 → 2002 May 17

Conference

Conference	4th International Conference on Advances in Fluid Mechanics
Country/Territory	Belgium
City	Ghent
Period	2002/05/15 → 2002/05/17

Subject classification (UKÄ)

Energy Engineering

Free keywords

fluids
dissipation rate
temperature variance
anisotropic eddy diffusivity model
DNS channel flow
scalar passive flux
transport equation
turbulent heat fluxes
WET type model
turbulent scalar fluxes
Prandtl numbers
domain name system channel flow

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10.2495/AFM020061

Cite this

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title = "An explicit WET-type model for the turbulent scalar fluxes",

abstract = "A new explicit WET model for the turbulent heat fluxes is derived and developed from the transport equation of the scalar passive flux. In order to study the performance of the model itself, all other turbulent quantities are taken from a DNS channel flow data-base and thus the error source has been minimized. This anisotropic eddy diffusivity model can be solved with a two-equation model for the temperature field based on the temperature variance and its dissipation rate. The model can theoretically be used for a range of Prandtl numbers or a range of different fluids. The results are compared with the DNS channel flow and fairly good agreement is achieved",

keywords = "fluids, dissipation rate, temperature variance, anisotropic eddy diffusivity model, DNS channel flow, scalar passive flux, transport equation, turbulent heat fluxes, WET type model, turbulent scalar fluxes, Prandtl numbers, domain name system channel flow",

author = "Masoud Rokni and Bengt Sund{\'e}n",

year = "2002",

doi = "10.2495/AFM020061",

language = "English",

isbn = "1-85312-910-0",

pages = "55--64",

editor = "M. Rahman and R. Verhoeven and C.A. Brebbia",

booktitle = "Advances in Fluid Mechanics. AFM 2002. Fourth International Conference",

publisher = "WIT Press",

address = "United Kingdom",

note = "4th International Conference on Advances in Fluid Mechanics ; Conference date: 15-05-2002 Through 17-05-2002",

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TY - GEN

T1 - An explicit WET-type model for the turbulent scalar fluxes

AU - Rokni, Masoud

AU - Sundén, Bengt

PY - 2002

Y1 - 2002

N2 - A new explicit WET model for the turbulent heat fluxes is derived and developed from the transport equation of the scalar passive flux. In order to study the performance of the model itself, all other turbulent quantities are taken from a DNS channel flow data-base and thus the error source has been minimized. This anisotropic eddy diffusivity model can be solved with a two-equation model for the temperature field based on the temperature variance and its dissipation rate. The model can theoretically be used for a range of Prandtl numbers or a range of different fluids. The results are compared with the DNS channel flow and fairly good agreement is achieved

AB - A new explicit WET model for the turbulent heat fluxes is derived and developed from the transport equation of the scalar passive flux. In order to study the performance of the model itself, all other turbulent quantities are taken from a DNS channel flow data-base and thus the error source has been minimized. This anisotropic eddy diffusivity model can be solved with a two-equation model for the temperature field based on the temperature variance and its dissipation rate. The model can theoretically be used for a range of Prandtl numbers or a range of different fluids. The results are compared with the DNS channel flow and fairly good agreement is achieved

KW - fluids

KW - dissipation rate

KW - temperature variance

KW - anisotropic eddy diffusivity model

KW - DNS channel flow

KW - scalar passive flux

KW - transport equation

KW - turbulent heat fluxes

KW - WET type model

KW - turbulent scalar fluxes

KW - Prandtl numbers

KW - domain name system channel flow

U2 - 10.2495/AFM020061

DO - 10.2495/AFM020061

M3 - Paper in conference proceeding

SN - 1-85312-910-0

SP - 55

EP - 64

BT - Advances in Fluid Mechanics. AFM 2002. Fourth International Conference

A2 - Rahman, M.

A2 - Verhoeven, R.

A2 - Brebbia, C.A.

PB - WIT Press

T2 - 4th International Conference on Advances in Fluid Mechanics

Y2 - 15 May 2002 through 17 May 2002

ER -

An explicit WET-type model for the turbulent scalar fluxes

Abstract

Conference

Subject classification (UKÄ)

Free keywords

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