The influence of a magnetic field on turbulent heat transfer of a high Prandtl number fluid

Nakaharai, Hiroyuki; Takeuchi, J.; Yokomine, Takehiko; Kunugi, Tomoaki; Satake, Shin‐ichi; Morley, Neil B.; Abdou, Mohamed

doi:10.1016/j.expthermflusci.2007.01.001

Cited by 25 publications

(8 citation statements)

References 10 publications

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“…In another paper [2], Gardner and Lykoudis reported that the effect of a transverse magnetic field on the turbulent heat transfer was to inhibit the convective mechanism of heat transfer, resulting in up to 70% reductions in Nusselt number. Recently, a similar result has been reported by Nakaharai et al [3]. They observed that a transverse magnetic field suppresses the temperature fluctuation and steepens the mean temperature gradient in near-wall region in the direction parallel to the magnetic field.…”

Section: Introductionsupporting

confidence: 66%

Magnetic field effect on laminar heat transfer in a pipe for thermal entry region

2011

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The influence of a transverse magnetic field on the local heat transfer of an electrically-conducting laminar fluid flow with high Prandtl number through a pipe was studied experimentally. Experiments indicated an increase in the local Nusselt number. The coupled set of the equations of motion and the energy equation including the viscous and Joule dissipation terms becomes non-linear and is solved numerically using a finite difference scheme. Favorable comparisons with experimental results confirm the correctness of the numerical results. It is found that the influence of magnetic field can be diminished by reducing the angle between the flow direction and the direction of magnetic field. The wall temperature reduces as the value of Hartmann number increases and the reduction rate of the wall temperature decreases as the value of Hartmann number exceeds a certain value. The average Nusselt number asymptotically approaches its limit as the Hartmann number becomes larger. Also, curve fitting can be employed to derive an equation for the average Nusselt number as a function of the Hartmann number. This equation is similar to the Sieder-Tate equation. It is observed that increasing the Hartmann number has no considerable effect on the thermal boundary layer thickness but decreases the temperature of fluid layers inside the boundary layer.

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Section: Introductionsupporting

confidence: 66%

Magnetic field effect on laminar heat transfer in a pipe for thermal entry region

2011

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“…The use of swirl tubes and sphere-packed pipes is proposed for heat transfer enhancement. By numerical simulation, the swirl tubes were found to improve the heat transfer coefficient in a high-Prandtl-number fluid under a magnetic field [3]. However, the heat transfer coefficient is lower with a magnetic field than without it.…”

Section: Introductionmentioning

confidence: 97%

Thermohydraulic analysis of high-Prandtl-number fluid in complex duct simulating first wall in fusion reactor

Satake

Yuki

Hashizume

2010

Fusion Engineering and Design

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“…The effect of the magnetic field on scalar transport in a turbulent channel flow was studied experimentally in Takahashi (1998) and Nakaharai et al (2007) and computationally in Yamamoto et al (2008);; Dritselis and Vlachos (2011). The case of a uniform wall-normal magnetic field was considered.…”

Section: Introductionmentioning

confidence: 99%

Turbulence and transport of passive scalar in magnetohydrodynamic channel flows with different orientations of magnetic field

Dey

Zikanov

2012

International Journal of Heat and Fluid Flow

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The influence of a magnetic field on turbulent heat transfer of a high Prandtl number fluid

Cited by 25 publications

References 10 publications

Magnetic field effect on laminar heat transfer in a pipe for thermal entry region

Magnetic field effect on laminar heat transfer in a pipe for thermal entry region

Thermohydraulic analysis of high-Prandtl-number fluid in complex duct simulating first wall in fusion reactor

Turbulence and transport of passive scalar in magnetohydrodynamic channel flows with different orientations of magnetic field

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