Application of RANS turbulence closure models to flows subjected to electromagnetic and buoyancy forces

Dean Wilson; Timothy J Craft; Hector Iacovides

doi:doi:10.1016/j.ijheatfluidflow.2014.04.003

Application of RANS turbulence closure models to flows subjected to electromagnetic and buoyancy forces

Dean Wilson, Timothy J Craft, Hector Iacovides

Research output: Contribution to journal › Article › peer-review

Abstract

This paper considers the application of the Reynolds Averaged Navier–Stokes (RANS) approach to two types of electromagnetically influenced turbulent flows. The first is a fully-developed 2D channel flow with a magnetic field imposed in either the wall-normal direction (Hartmann flow), or in the streamwise direction. The second is that of Rayleigh–Bénard convection with a vertical magnetic field imposed. The turbulence is represented by a low-Re k e model which is tested with and without electromagnetic modifications proposed by Kenjereš and Hanjalic´ (2000). The results show the modifications lead to a dramatic reorganisation of the coherent structures in Rayleigh–Bénard convection as the magnetic field strength is increased, but overpredict the damping of the turbulent shear stress in a simple channel flow.

Original language	English
Pages (from-to)	80-90
Number of pages	10
Journal	International Journal of Heat and Fluid Flow
Volume	49
DOIs	https://doi.org/doi:10.1016/j.ijheatfluidflow.2014.04.003
Publication status	Published - Oct 2014

Keywords

Magnetohydrodynamics
Turbulence
Closure models
Rayleigh–Bénard convection
Reynolds Averaged Navier–Stokes

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doi:10.1016/j.ijheatfluidflow.2014.04.003

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@article{85284eee53ec4ead84a000af4d2df02c,

title = "Application of RANS turbulence closure models to flows subjected to electromagnetic and buoyancy forces",

abstract = "This paper considers the application of the Reynolds Averaged Navier–Stokes (RANS) approach to two types of electromagnetically influenced turbulent flows. The first is a fully-developed 2D channel flow with a magnetic field imposed in either the wall-normal direction (Hartmann flow), or in the streamwise direction. The second is that of Rayleigh–B{\'e}nard convection with a vertical magnetic field imposed. The turbulence is represented by a low-Re k e model which is tested with and without electromagnetic modifications proposed by Kenjere{\v s} and Hanjalic´ (2000). The results show the modifications lead to a dramatic reorganisation of the coherent structures in Rayleigh–B{\'e}nard convection as the magnetic field strength is increased, but overpredict the damping of the turbulent shear stress in a simple channel flow.",

keywords = "Magnetohydrodynamics, Turbulence, Closure models, Rayleigh–B{\'e}nard convection, Reynolds Averaged Navier–Stokes",

author = "Dean Wilson and Craft, {Timothy J} and Hector Iacovides",

year = "2014",

month = oct,

doi = "doi:10.1016/j.ijheatfluidflow.2014.04.003",

language = "English",

volume = "49",

pages = "80--90",

journal = "International Journal of Heat and Fluid Flow",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Application of RANS turbulence closure models to flows subjected to electromagnetic and buoyancy forces

AU - Wilson, Dean

AU - Craft, Timothy J

AU - Iacovides, Hector

PY - 2014/10

Y1 - 2014/10

N2 - This paper considers the application of the Reynolds Averaged Navier–Stokes (RANS) approach to two types of electromagnetically influenced turbulent flows. The first is a fully-developed 2D channel flow with a magnetic field imposed in either the wall-normal direction (Hartmann flow), or in the streamwise direction. The second is that of Rayleigh–Bénard convection with a vertical magnetic field imposed. The turbulence is represented by a low-Re k e model which is tested with and without electromagnetic modifications proposed by Kenjereš and Hanjalic´ (2000). The results show the modifications lead to a dramatic reorganisation of the coherent structures in Rayleigh–Bénard convection as the magnetic field strength is increased, but overpredict the damping of the turbulent shear stress in a simple channel flow.

AB - This paper considers the application of the Reynolds Averaged Navier–Stokes (RANS) approach to two types of electromagnetically influenced turbulent flows. The first is a fully-developed 2D channel flow with a magnetic field imposed in either the wall-normal direction (Hartmann flow), or in the streamwise direction. The second is that of Rayleigh–Bénard convection with a vertical magnetic field imposed. The turbulence is represented by a low-Re k e model which is tested with and without electromagnetic modifications proposed by Kenjereš and Hanjalic´ (2000). The results show the modifications lead to a dramatic reorganisation of the coherent structures in Rayleigh–Bénard convection as the magnetic field strength is increased, but overpredict the damping of the turbulent shear stress in a simple channel flow.

KW - Magnetohydrodynamics

KW - Turbulence

KW - Closure models

KW - Rayleigh–Bénard convection

KW - Reynolds Averaged Navier–Stokes

U2 - doi:10.1016/j.ijheatfluidflow.2014.04.003

DO - doi:10.1016/j.ijheatfluidflow.2014.04.003

M3 - Article

VL - 49

SP - 80

EP - 90

JO - International Journal of Heat and Fluid Flow

JF - International Journal of Heat and Fluid Flow

ER -

Application of RANS turbulence closure models to flows subjected to electromagnetic and buoyancy forces

Abstract

Keywords

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