Publication Cover
Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 69, 2016 - Issue 2
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Original Articles

Assessment of six turbulence models for modeling and predicting narrow passage flows, part 1: Impingement jets

, , &
Pages 109-127 | Received 11 Mar 2015, Accepted 19 May 2015, Published online: 30 Nov 2015
 

ABSTRACT

The current study focuses on numerical investigations of narrow passage flows with impingement jets. Six different turbulence models, including linear eddy viscosity models, an explicit algebraic Reynolds stress model, and a V2f model, are explored as they are utilized with k-ϵ and k-ω platforms. The main objective is a comparison of the numerical accuracy of models as applied to the simulation of complex flows within narrow passages. Numerical results obtained with the different models are compared with the experimental data from the literature. As such, comparisons are performed for different flow field quantities, including mean velocity components, Reynolds stress tensor components, and surface Nusselt number distribution.

Nomenclature

D=

diameter of impingement jet hole

Gj=

jet mass flow

k=

turbulent kinetic energy

Nu=

Nusselt number

P=

mean pressure

Pr=

Prandtl number

PrT=

turbulent Prandtl number

q″=

wall heat flux

Re=

Reynolds number

T=

mean temperature

TKE=

turbulent kinetic energy

Tu=

turbulence intensity

ui=

fluctuating velocity component

Ui=

mean velocity component

Vj=

jet velocity

X=

longitudinal coordinate

Y=

lateral coordinate

Z=

vertical coordinate

Ωy=

lateral vorticity

xi=

spatial coordinates

δij=

Kronecker delta

ϵ=

turbulent kinetic energy dissipation

ν=

dynamic viscosity

νt=

turbulent eddy viscosity

ρ=

fluid density

ω=

specific dissipation rate of turbulent kinetic energy

Nomenclature

D=

diameter of impingement jet hole

Gj=

jet mass flow

k=

turbulent kinetic energy

Nu=

Nusselt number

P=

mean pressure

Pr=

Prandtl number

PrT=

turbulent Prandtl number

q″=

wall heat flux

Re=

Reynolds number

T=

mean temperature

TKE=

turbulent kinetic energy

Tu=

turbulence intensity

ui=

fluctuating velocity component

Ui=

mean velocity component

Vj=

jet velocity

X=

longitudinal coordinate

Y=

lateral coordinate

Z=

vertical coordinate

Ωy=

lateral vorticity

xi=

spatial coordinates

δij=

Kronecker delta

ϵ=

turbulent kinetic energy dissipation

ν=

dynamic viscosity

νt=

turbulent eddy viscosity

ρ=

fluid density

ω=

specific dissipation rate of turbulent kinetic energy

Acknowledgments

The first author thanks colleagues at Tsinghua University, Beijing, and the University of Alabama, Huntsville.

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